Drilling Machine
Q. Point consists of a_____ center.
A. dead
B. live
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: Point consists of a dead center. Dead center is edge which is sharp situated at the extreme tip of the drill.
Q. The cone-shaped end, which does the cutting is the_____
A. shank
B. point
C. tang
D. none of the mentioned
.
Answer: B
Explanation: As per the definition of point. This part performs the drilling work. Point is the very important for the drilling operation.
Q. Which of the following does the point consist?
A. lips
B. cutting edges
C. heel
D. all of the mentioned
.
Answer: D
Explanation: The point consists of all these things. Cutting edges of drill are known as lips. Heel is a portion of this point back from the cutting edge.
Q. Which of the following is the driving end of the drill?
A. tang
B. flute
C. shank
D. land
.
Answer: C
Explanation: Shank is the driving end of the drill. This shank is clamped in the spindle.
Q. Which of the following is the type of shank?
A. taper shank
B. straight shank
C. taper shank and straight shank both
D. none of the mentioned
.
Answer: C
Explanation: Both taper shank and straight shank are the types of it. Straight shank drill uses a chuck while taper shank uses self holding taps.
Q. Taper shank is used for______ diameter drills.
A. small
B. large
C. both large and small
D. none of the mentioned
.
Answer: B
Explanation: For large diameter, taper shank is used. Self holding taps of this shank fits easily into the drill spindle and can perform the job easily.
Q. Body clearance is the part of body which has been reduced.
A. true
B. false
.
Answer: A
Explanation: Body clearance is a part which is reduced with a purpose to cut down the friction between the drill and the wall of the hole.
Q. Flute fits into the slot of the drilling machine.
A. true
B. false
.
Answer: B
Explanation: This is false. Tang fits into the slot of the drilling machine.
Q. Which of the following is not the part of a body?
A. land
B. margin
C. flute
D. none of the mentioned
.
Answer: D
Explanation: All are parts of body. Land and margin are synonyms. Apart from these, body clearance is also the part of body.
Q. ______ are the spiral grooves which run to the length of the drill.
A. tangs
B. flutes
C. shanks
D. none of the mentioned
.
Answer: B
Explanation: As per the definition of flutes. These flutes curl the chip strongly for the purpose of easier removal.
Q.. The tang allows the coolant to flow to the cutting edge.
A. true
B. false
.
Answer: B
Explanation: This is false. The flutes allow this. The flutes also allows the flow of lubricants.
Q.. The diameter of the drill is measured across the land/margin.
A. true
B. false
.
Answer: A
Explanation: This is true. The land/margin is the narrow strip which extends to the entire length of the flutes.
Q.. The portion between the point and the shank is called______
A. body
B. drill
C. both body and drill
D. none of the mentioned
.
Answer: C
Explanation: Both terms can be used for this. The body is generally made of flute, margin and body clearance.
Q. Table top drilling machine can be categorized as_______
A. general purpose drilling machine
B. specific purpose drilling machine
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: Table top drilling machine can be categorized as general purpose drilling machine as it is not used for any specific application.
Q. Which type of feed can be given in table top drilling machine?
A. manual
B. power
C. both manual and power feed
D. none of the mentioned
.
Answer: A
Explanation: Manual feed is given in this machine. We don’t deal with very heavy jobs in table top drilling machine so manual feed can perform job sufficiently.
Q. Power produced by table top drilling machine is comparatively low.
A. true
B. false
.
Answer: A
Explanation: This is true. Power produced is comparatively low because manual feed is given to this machine, not powered feed.
Q. In table top drilling machine, feed can be operated by_____
A. gear mechanism
B. lever
C. spindle
D. none of the mentioned
.
Answer: B
Explanation: The feed can be operated by lever in this machine. This lever can be operated manually to provide feed.
Q. Generally, table top drilling machine can produce diameters up to______
A. 1 mm
B. 10 mm
C. 100 mm
D. none of the mentioned
.
Answer: B
Explanation: It can produce diameter up to 10 mm. As it is operated by manual feed, its power production is low so it is not used for producing large diameters.
Q. Table top drilling machine can be mounted on the table.
A. true
B. false
.
Answer: A
Explanation: It can be mounted or clamped on the table to accommodate with job.
Q. Table top drilling machine is generally______ in terms of height.
A. small
B. big
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: Table tap drilling machine is comparatively small in terms of height. It is hardly 1 to 3 feet long in height.
Q. In table top drilling machine, belt-pulley system operates______
A. lever
B. spindle
C. both lever and spindle
D. none of the mentioned
.
Answer: B
Explanation: Spindle is operated by this belt-pulley system. Lever can be operated manually for feed.
Q. Drill is mounted on lever in table top drilling machine.
A. true
B. false
.
Answer: B
Explanation: This is false. Drill is mounted on spindle in table top drilling machine.
Q. Which of the following is not true for table top drill machine?
A. it is used in only small jobs
B. it is used for mass production
C. odd shape jobs are not machined
D. none of the mentioned
.
Answer: B
Explanation: All mentioned are true accept the sentence which says that it is usede for mass production. It cannot be used for mass production. It is very small and used only for small job work.
Q. Distance between the table and drill is_____ in pillar drill machine as compare to table top drill machine.
A. small
B. high
C. same
D. none of the mentioned
.
Answer: B
Explanation: The distance between the table and drill is more in pillar drill machine. Pillar drill uses a column and base along with drill making a sturdy as well as safe place to drill materials like wood and so on.
Q. Which of the following is not true for pillar drill machine?
A. it is an extension of table top drill machine
B. it is very strong
C. it is not rigid
D. none of the mentioned
.
Answer: B
Explanation: All mentioned sentences are true except one which says that it is very strong. This type of machine is not very tough or strong.
Q. Which type of motion is possible for table in pillar drill machine?
A. only swivel
B. only upward and downward
C. all swivel, upward and downward
D. none of the mentioned
.
Answer: C
Explanation: These all motions of table is possible in pillar drill machine in order to accommodate with job.
Q. The pillar drill machine can perform maximum______ mm of diameter job.
A. 10
B. 100
C. 20
D. 200
.
Answer: C
Explanation: Generally, this machine cannot perform more than 20 mm diameter job. It is used for job below 20 mm diameter.
Q. Pillar drill machine has a small tubular column.
A. true
B. false
.
Answer: B
Explanation: This is false. This machine has a long tubular column.
Q. In pillar drill machine, there may be chances of vibration.
A. true
B. false
.
Answer: A
Explanation: In this machine chances of vibrations are there as the column job is not very rigid.
Q. What is the maximum power that we can expect in pillar drill machine?
A. 0.5 Kw
B. Q.1 Kw
C. Q.5 Kw
D. Q..1 Kw
.
Answer: B
Explanation: As per the design, mechanism and performance, maximum Q.1 Kw power can be expected.
Q. The pillar drill machine can perform______ work.
A. light
B. heavy
C. both light and heavy
D. none of the mentioned
.
Answer: A
Explanation: This machine is ordinary machine, not made for specific purpose or special task and generally used only for light work.
Q. Which of the following is true for pillar drill machine?
A. it is taller
B. it can be mounted or fitted on ground or any other foundation
C. for the production of one or two pieces of light work, this can be used
D. all of the mentioned
.
Answer: D
Explanation: All sentences are taller. It is taller looks like a pillar that’s why this machine is known as pillar machine. It can be fixed on any base and only used for producing light work.
Q. Which of the following is not true for pillar drill machine?
A. it looks like a pillar
B. the table is movable
C. it is not used for mass production
D. none of the mentioned
.
Answer: D
Explanation: All the sentences are true. As the name pillar machine itself suggests that it looks like pillar. Its table can move in order to accommodate with the job requirements. Its ordinary machine, not used for mass production.
Q. Which type of work can be performed in column drill machine?
A. different job of material
B. different diameter of drill
C. different depth of drill
D. all of the mentioned
.
Answer: D
Explanation: These all can be performed in column drill machine. That’s why it is commonly used in all industry. Its common machine and can’t used for heavy application.
Q. Which of the following is not true for column drill machine?
A. it is very light
B. it is quite big in size
C. different types of works can be done in this machine
D. none of the mentioned
.
Answer: A
Explanation: All sentences are true except the one which says that it is very light. In fact, it is very rigid and ragged machine
Q. The production rate of the column drill machine is high.
A. true
B. false
.
Answer: B
Explanation: This is false. Its production rate is comparatively low but it can perform the operation quite nicely and often used in industry.
Q. Which of the following is not true for column drill machine?
A. it is strong machine structure
B. it is very powerful machine
C. it doesn’t allow high speed drilling
D. none of the mentioned
.
Answer: C
Explanation: All the sentences are true except the one which says that it doesn’t allow high speed drilling. This machine allows high speed drilling.
Q. Which of the following is not true for column drill machine?
A. accuracy is less
B. it is common type of drill machine used in industry
C. it is very rigid
D. none of the mentioned
.
Answer: A
Explanation: All the sentences are true except the one which says that accuracy is less in column drill machine. Accuracy is comparatively high in this type of machine.
Q. Which type of gear box does column drill machine possess?
A. speed gear box
B. feed gear box
C. both speed gear box and feed gear box
D. none of the mentioned
.
Answer: C
Explanation: Both type of gear boxes are there in this machine. Now a days column drill machine are also available with hydraulic feed and multi spindle head.
Q. The speed gear box and feed gear box are confined with the drilling head.
A. true
B. false
.
Answer: A
Explanation: It can be easily seen from the construction of this machine. Drilling head is a heavy and most important part of the drilling machine where lever and other components are attached.
Q. Column drill machine can be used for mass production.
A. true
B. false
.
Answer: B
Explanation: This is false. It can’t be used for mass production. It can be only used for small production as it is very rigid and intended only for some specific purposes. The rate at which produce the output is quite low.
Q. To enable the spindle speed, one can vary_____
A. speed of spindle
B. feed
C. both speed of spindle and feed
D. none of the mentioned
.
Answer: C
Explanation: We van vary speed of spindle and feed to enable the spindle speed. This spindle speed is also termed as feed rate or peripheral speed.
Q. Column drill machine can perform large diameter drills.
A. true
B. false
.
Answer: A
Explanation: It is the application of this machine. This machine can perform high speed drilling with multi spindle head.
Q.. In which of the following machine, automatic feed is possible?
A. table top drill
B. column drill
C. pillar drill
D. all of the mentioned
.
Answer: B
Explanation: In table top and pillar drill, only manual feed is possible but in case of column drill machine, automatic feed is possible.
Q.. Very odd types and heavy types jobs cannot be mounted and
machined in column drill.
A. true
B. false
.
Answer: B
Explanation: This is false. Very odd and heavy types of jobs can be mounted easily machined in column drill.
Q. The rigidness of radial drill machine is______ column drill machine.
A. less than
B. same as
C. more than
D. none of the mentioned
.
Answer: C
Explanation: Radial drills can make large diameter of holes so its rigidness should be more column drill machine.
Q. Thickness of valve in the radial machine is _____
A. small
B. large
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: Valve thickness is quite large in this machine as it has to drill large diameter of holes.
Q. There is a radial arm on the tubular column in radial drill machine.
A. true
B. false
.
Answer: A
Explanation: As per the construction of this machine. On this radial arm, the spindle head is mounted.
Q. Which type of movement is possible in case of radial arm?
A. only swivel
B. only up and down
C. all up, down and swivel
D. none of the mentioned
.
Answer: B
Explanation: Only up and down movement is possible in this case. Generally, horizontal movement is not possible in radial arm.
Q. The movement of radial arm is______
A. manual
B. powered
C. either manual or powered
D. none of the mentioned
.
Answer: C
Explanation: Both movements are possible. But at the time when we have to deal with heavy and large workpieces the powered movement is more preferable.
Q. Which of the following holds the drill spindle?
A. radial arm
B. tubular column
C. drilling head
D. none of the mentioned
.
Answer: C
Explanation: Drilling head holds the drill spindle. There is a motor which is mounted on the spindle head rotates this spindle.
Q. The drilling head can move_______
A. inward and outward
B. up and down
C. all inward and outward and up and down
D. none of the mentioned
.
Answer: C
Explanation: These all types of motions are possible in this case. The drilling head is mounted on the radial arm.
Q. Which of the following is not true for radial drill?
A. it can work with jobs, which are odd shaped
B. the tubular column is very thick and has small diameters
C. drill is mounted on drilling spindle
D. none of the mentioned
.
Answer: B
Explanation: The tubular is thick but it has large diameter not small.
Q. Which of the following is true for radial drill machine?
A. drilling spindle is subjected to rotation
B. the entire drilling head is mounted on radial arm
C. the gap between the drill and job is known as stroke length
D. all of the mentioned
.
Answer: D
Explanation: All sentences are true. There is a one thing that we should know about radial drilling machine is that we can make multiple holes in one setting of work. This is the advantage of the radial drilling machine.
Q. The radial arm can be rotated about the tubular column.
A. true
B. false
.
Answer: A
Explanation: This is the property of radial arm. This arm can be lifted or lowered according to the requirements.
Q.. In radial arm, spindle may be_____
A. vertical
B. swiveling
C. swiveling and tilting
D. all of the mentioned
.
Answer: D
Explanation: These all types of spindle are possible. The rotation of spindle is done by the motor mounted on the spindle head.
Q. Which of the following machine is portable?
A. hand drill
B. none of mentioned
C. pillar drill
D. column drill
.
Answer: A
Explanation: Pillar drill and column drill are heavy enough to carry. Hand drill can be driven by hand.
Q. Size of hand drill is relatively ______
A. small
B. medium
C. large
D. very large
.
Answer: A
Explanation: Size of hand drill is relatively small. It is so small that man can hold it in his hand.
Q. In hand drill, force on the spindle is_____
A. less
B. more
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: Generally, force on the spindle is less in this machine as this machine has to be carried by hand-manually. So smaller the force, more easier it to carry in hand.
Q. In hand drill, spindle is rotated by aerator system.
A. true
B. false
.
Answer: A
Explanation: Hand drill is such a small that it can be hold by hand and for that it should be flexible for normal use. For that, generally we provide aerator system for the rotation of the spindle.
Q. If you want to make a hole in a switch board, then you will use______
A. table top drill machine
B. pillar drill machine
C. hand drill machine
D. column drill machine
.
Answer: C
Explanation: Hand drill machine is used for this purpose because it is portable. We can’t move switch board to the machine. Switch board is fixed. So, in order to perform drilling operation in switch board we need a portable device and for that purpose we use hand dril.
Q. In which of the following drill machine, number of drills are used simultaneously?
A. table top drill machine
B. pillar drill machine
C. hand drill machine
D. gang drill machine
.
Answer: D
Explanation: Gang drill is used for this purpose. As the name suggest, gang drill is used for gang production means for large production and for that it uses number of drills simultaneously.
Q. Which type of drilling can be done in gang drill machine?
A. progressive
B. parallel
C. both progressive and parallel
D. none of the mentioned
.
Answer: C
Explanation: Both types of drills can be performed in this machine as number of drills can be used simultaneously.
Q. Use of a jig is necessary in gang drill.
A. true
B. false
.
Answer: A
Explanation: Jig is always needed. Jig provides the replica of actual task.
Q. Gang drill is used for______
A. large-batch production
B. small production
C. relatively low production
D. none of the mentioned
.
Answer: A
Explanation: It is used for large productions because it can produce large number of holes simultaneously.
Q. In which of the following, accuracy is more?
A. table top drill
B. hand drill
C. pillar drill
D. gang drill
.
Answer: D
Explanation: Accuracy is higher in gang drill. We use separate jig for each and every job in gang drill.
Q. Which of the following has higher production rate?
A. table top drill
B. gang drill
C. column drill
D. turret drill
.
Answer: D
Explanation: Turret drill has higher production rate compare to others. This turret word is derived from Italian word torretta which means a tower.
Q. Turret drill generally has ______ axis.
A. horizontal
B. vertical
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: Turret drill generally has vertical axis. It has it axis along with y axis.
Q. In turret drill, drills are mounted in holes.
A. true
B. false
.
Answer: A
Explanation: It can be easily seen from the construction of this machine. The drills are mounted in holes while the table is used for the fixing of jobs.
Q. In turret drill, which of the following is mounted in holes?
A. boring tool
B. ream cutter
C. countersinking tool
D. all of the mentioned
.
Answer: D
Explanation: All can be mounted in holes. Turret drill is a versatile tool. It can enlarge the drill and perform number of operations. For that purpose, all mentioned types of tools can be mounted in holes.
Q. A job is mounted______ in turret drill.
A. on table
B. in holes
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: A job is mounted on table in turret drill. At the same time, tools are mounted in holes.
Q. In turret drill, table can move______
A. in x direction
B. in y direction
C. either in x direction or in y direction
D. none of the mentioned
.
Answer: C
Explanation: The table can move either in x direction or in y direction in order to accommodate with work.
Q. The entire turret can move horizontally inward and outward along with drill.
A. true
B. false
.
Answer: B
Explanation: This is false. The entire turret can move vertically up and down along with drill.
Q. Which type of operation is possible in turret drill?
A. secondary enlargement
B. thrust enlargement
C. both secondary enlargement and thrust enlargement
D. none of the mentioned
.
Answer: C
Explanation: Both operations are possible in turret drill. Thrust is a reaction force explained by newton in its second and third law.
Q. In turret drill, table moment can be_______
A. mechanical
B. hydraulic
C. electrohydraulic
D. all of the mentioned
.
Answer: D
Explanation: All type of moment can be possible in turret drill. This make this drill more efficient to perform the desired job.
Q. Boring and reaming operations are also possible in turret drill.
A. true
B. false
.
Answer: A
Explanation: Though drills are developed especially for making holes but today these drill machines become a versatile tool which perform various types of operations. These all operations are possible in this machine.
Q. Multi spindle drilling machine is used for lot production.
A. true
B. false
.
Answer: A
Explanation: Multi spindle drilling is used to make drill in a huge number at a time-simultaneously. So this machine can be used for lot production.
Q. Multi spindle drilling machine can be categorized as_______
A. general purpose drilling machine
B. special purpose drilling machine
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: It is a special purpose drilling machine. It is not used for general purpose. It is used when we need to make a lot of holes simultaneously of different shape and different depth and again in mass production.
Q. Multi spindle drilling machines can have spindles up to 10 to Q..
A. true
B. false
.
Answer: A
Explanation: As per the construction of this machine. Due to large number of spindles, it can makes a lot of holes simultaneously.
Q. Which of the following is true for multi spindle drill machine?
A. it can’t make number of holes at different location and of different size
B. it is able to make number of holes at different location and of different size
C. it can’t make number of holes at different location , but can make holes of different size
D. it can make number of holes at different location , but can not make holes of different size
.
Answer: B
Explanation: This machine can make number of holes at different location and also of different sizes. This reduces the time of operations and also increases the accuracy.
Q. Multi spindle drill machines can produce holes of different______
A. shapes
B. depth
C. both shapes and depth
D. none of the mentioned
.
Answer: C
Explanation: It can produce variety of holes of different sizes and shapes. There are number of spindles which can perform simultaneously.
Q. In multi spindle drill, for each type of job separate jig should be used.
A. true
B. false
.
Answer: A
Explanation: Jig should be resembles with the job. This is the necessary condition for multi spindle drill and for that reason separate jig is used for each type job.
Q. Which of the following is the part of multi spindle drill machine?
A. motor
B. central gear
C. planetary gear
D. all of the mentioned
.
Answer: D
Explanation: All mentioned are the parts of this machine. Apart from this, for the purpose of mass production, adjustable center type design and number of other parts are also provided.
Q. In multi spindle drill,the circular angular rotation, position and location of the spindle can’t be changed.
A. true
B. false
.
Answer: B
Explanation: In multi spindle drill machine, circular angular rotation, position and location of the spindle can be varied.
Q. In multi spindle drill, the drills are used at______
A. same height
B. different height
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: The drills are used at different height in this machine to make drill of different depth and at different place.
Q. The movement of entire head is little difficult and not economical in this machine.
A. true
B. false
.
Answer: A
Explanation: The movement of entire head is little difficult and not economical in this machine, because the size of the head is comparatively big.
Q. Micro drill machine is also known as mini drill machine.
A. true
B. false
.
Answer: A
Explanation: As per the definition of micro drill machine. As the name suggest micro drill makes very small holes so it is also known as mini drill machine.
Q. Micro drill machine means it has height in terms of micrometer.
A. true
B. false
.
Answer: B
Explanation: It doesn’t have height in terms of micrometers. It is very small that’s why it is termed as micro drill machine.
Q. The base of the micro drill is______
A. light
B. heavy
C. very light
D. none of the mentioned
.
Answer: B
Explanation: The base is generally heavy in this case. To make hole, drill needs a huge downward pressure. To sustain this pressure, base should be heavy.
Q. The base of the table is_____ in micro drill machine.
A. free
B. fixed
C. either free or fixed
D. none of the mentioned
.
Answer: C
Explanation: The base can be either free or fixed base on the job. But it should be strong to withstand high pressure.
Q. Which type of motion is possible for drilling head?
A. up
B. down
C. up and down
D. none of the mentioned
.
Answer: C
Explanation: Drilling head can be moved up and down in order to accommodate with the job.
Q. Feed motion can be controlled automatically.
A. true
B. false
.
Answer: A
Explanation: As per the working of this machine. We don’t need manual support for the control of feed motion. The feed of a drill is the distance the drill moves into work at each revolution of the spindle.
Q. If the speed of the drill increases, then the thrust force will______
A. increase
B. decrease
C. remain same
D. none of the mentioned
.
Answer: B
Explanation: If the speed of the drill increases, then the thrust force will decrease. Here the thrust force is the reaction force explained by newton’s second and third laws.
Q. If the speed of the drill decreases, then the torque will______
A. increase
B. decrease
C. remain same
D. none of the mentioned
.
Answer: A
Explanation: If the speed of the drill decreases, then the torque will increase as the thrust force increases with the decrement in the speed of drill.
Q. Which type of work can be done in micro drill machine?
A. fine work
B. electrical work
C. electro-fitting work
D. all of the mentioned
.
Answer: D
Explanation: All mentioned types of work can be done in micro drill machine. This the application of micro drill machine. In fine work, electrical work, elctro-fitting work we need small holes and for that purpose this machine is used.
Q. Micro drill machine looks like a table top drill machine.
A. true
B. false
.
Answer: A
Explanation: It is similar with table top machine and just small in size then the table top drill machine. So if we compare these machine on the basis of look, we can easily say that micro drill machine looks like a table top drill machine.
Q. Which of following is necessary for deep hole?
A. l/d ratio should be high
B. l/d ratio should be less
C. l/d ratio should be same
D. none of the mentioned
.
Answer: A
Explanation: L/d ratio should be very high for deep hole. Here l=length of the tool and d means diameter of the tool. If l/d ratio is high that means tool has large length compare to its diameter and then and then only it can make deep holes.
Q. Where we need the deep hole?
A. barrel of guns
B. both barrel of guns and oil holes in crank shaft
C. oil holes in crank shaft
D. none of the mentioned
.
Answer: C
Explanation: We need the deep hole in all these application. Crank shaft is a machine responsible for conversion between reciprocating motion and rotary motion.
Q. Which of the following problem we face with deep hole?
A. drill breakage
B. poor cutting fluid action
C. chip clogging
D. all of the mentioned
.
Answer: D
Explanation: These all problems we face with deep hole. There are some chances that cutting fluid can not able to reach at the bottom at the drill, at that time chip can be clogged to the flute. This is chip clogging.
Q. In deep hole drill, there should be small helix angle.
A. true
B. false
.
Answer: B
Explanation: This is wrong. In deep hole, there should be large helix angle.
Q. Deep hole drilling machines are normally______
A. vertical
B. horizontal
C. 45 degree inclined to both horizontal and vertical axis
D. none of the mentioned
.
Answer: B
Explanation: Deep hole drilling machines are normally horizontal. These machines have horizontal axis.
Q. In deep hole drill, high speed spindle________
A. reduce the cutting force
B. increase the cutting force
C. doesn’t affect the cutting force
D. none of the mentioned
.
Answer: A
Explanation: High speed spindle reduces the cutting force. If the spindle move with fast speed, we need less cutting force.
Q. Deep hole drill machines have high rigidity.
A. true
B. false
.
Answer: A
Explanation: This is true. It has high rigidity so that there will be no chance of vibration.
Q. In deep hole drill machine, the tool is_____
A. long
B. slender
C. long and slender
D. none of the mentioned
.
Answer: C
Explanation: The tool is very slender and long in deep hole machine as this machine has to make deep hole so it is necessary that the tool should be long as well as slender.
Q. The lateral movement is prevented with the help of tool guide in deep hole drill.
A. true
B. false
.
Answer: A
Explanation: The lateral movement is prevented with the help of tool guide in deep hole drill with a purpose of better performance as it can affect adversely. .
Q. Today deep hole drill machines are converted in cnc control.
A. true
B. false
.
Answer: A
Explanation: It is converted in cnc control machine to obtain high accuracy.
Q. Sensitive bench drilling machine is quite large in size.
A. true
B. false
.
Answer: B
Explanation: This is false. Sensitive bench drilling machine is small in size.
Q. Sensitive bench drilling machine is used for____
A. heavy work
B. light work
C. both heavy and light work
D. none of the mentioned
.
Answer: B
Explanation: It is used only for light work as it is not a big machine. It is comparatively small machine.
Q. Sensitive bench drilling machine is capable of drilling holes up to ______ mm diameter.
A. Q.25
B. Q..5
C. Q.5
D. 25
.
Answer: B
Explanation: It can drill up to Q..5 mm diameter as it is only used for small work, not for heavy work.
Q. For normal drilling, the work surface of sensitive bench drilling machine is kept vertical.
A. true
B. false
.
Answer: B
Explanation: This is false. For normal drilling, the work surface is kept horizontal.
Q. Sensitive type of drilling machine is the simplest type of drilling machine.
A. true
B. false
.
Answer: A
Explanation: It is the simplest type of drilling machine as it is very small and again used for only light work.
Q. Which of the following is the part of sensitive bench drilling machine?
A. driving motor
B. cone pulley
C. sleeve
D. all of the mentioned
.
Answer: D
Explanation: All are the parts of this machine. Apart from these, chuck, spindle lock, deep gauge and stop, belt guard etc. are also the part of this machine.
Q. The base of the sensitive bench drilling machine is____
A. free
B. mounted on a bench
C. rotary
D. none of the mentioned
.
Answer: B
Explanation: The base is mounted on a bench. Its not free and again it doesn’t have any rotary motion.
Q. Machine spindle possesses tapered hole in sensitive bench drilling machine.
A. true
B. false
.
Answer: A
Explanation: As per the construction of this machine. Tapered hole means a hole which is thinner towards one end compare to other end.
Q. In sensitive bench drilling machine, the drills are fitted in ____
A. chuck
B. spindle
C. either in chuck or in spindle
D. none of the mentioned
.
Answer: C
Explanation: The drills are fitted in chucks or in the spindle. There are various types of chuck like two jaw chuck, three jaw chuck, four jaw chuck etc.
Q. If the holes are to be drilled at an angle, the table can be titled.
A. true
B. false
.
Answer: A
Explanation: It can be seen from the construction of this machine. If we want to make hole at any angle, the table can be titled to obtain proper position and that’s the reason this machine can make holes at various angles.
Q.. Which of the following is wrong about sensitive bench drilling machine?
A. different spindle speeds can be achieved
B. we can change the position of belt in the stepped pulley
C. there is some space between the work table and base
D. none of the mentioned
.
Answer: D
Explanation: Nothing is wrong. All are right. Some space is the between the work table and base, various type of spindle speed can also be achieved and again we can also change the position of the belt in stepped pulley.
Q. Which of the following operation, we can’t perform on drilling machine?
A. reaming
B. tapping
C. lapping
D. none of the mentioned
.
Answer: D
Explanation: Although drilling is primarily intended for drill but now it becomes a versatile tool. It can perform various operations including reaming, tapping, lapping and so on.
Q. Tapping attachment is included in_______ method of tool holding devices.
A. by chucks
B. by a sleeve
C. by directly fitting in the spindle
D. none of the mentioned
.
Answer: D
Explanation: It is included in special attachment method. In tapping, one end is always thinner than other end.
Q. Floating holder is included in______ method of tool holding devices.
A. by directly fitting in the spindle
B. by special attachments
C. by a socket
D. none of the mentioned
.
Answer: B
Explanation: It is included in special attachment. Floating holder is a type of holder that permits certain amount freedom to enable the tool with a purpose of maintaining a proper path relative to the work.
Q. Which of the following method is not used for holding tool?
A. by a sleeve
B. by chucks
C. by a socket
D. none of the mentioned
.
Answer: D
Explanation: These all methods are used for holding tools. There are various types of chucks 2 jaw chuck, three jaw chuck etc. Sleeve and socket are also used for this purpose.
Q. We can’t perform grinding operation in a drilling machine.
A. true
B. false
.
Answer: B
Explanation: This is false. Now, drill machine becomes a versatile tool. We can perform grinding operation.
Q. Which of the following device is not used for holding the work in a drilling machine?
A. step block
B. drill jigs
C. both step block and drill jigs
D. none of the mentioned
.
Answer: D
Explanation: Both are used for holding the work in drilling machine.
Q. In drilling operation, work should be held by hand.
A. true
B. false
.
Answer: B
Explanation: Work shouldn’t be held by hand as it may causes injuries to the operator.
Q. The drilling machine is the second most important machine tool in a workshop.
A. true
B. false
.
Answer: A
Explanation: Lathe is the most important machine tool followed ny drill and shaper.
Q. The drilling machine was primarily designed to originate a _____
A. flat surface
B. cylindrical surface
C. taper surface
D. none of the mentioned
.
Answer: D
Explanation: It was primarily designed to originate a hole but now it can perform variety of operations.
Q. For drilling operation, the drill rotates with_____ pressure if job is held on earth.
A. upward
B. downward
C. 45 degree inclined to both planes
D. none of the mentioned
.
Answer: B
Explanation: It rotates with downward pressure if the job is below the machine on the earth.
Q. According to material, drill can be classified as_____
A. hss
B. carbides
C. bot hss and carbides
D. none of the mentioned
.
Answer: C
Explanation: Both hss and carbides are classified according to material. In carbides, generally cemented carbide is mostly used.
Q. HSS stands for high speed steel.
A. true
B. false
.
Answer: A
Explanation: HSS is the acronym form of high speed steel. It is commonly used in tool bits and cutting tools.
Q. HSS was introduced in______
A. 1895
B. 1905
C. 1915
D. none of the mentioned
.
Answer: C
Explanation: It was introduced in 19Q.. It was introduced in U.S.A.
Q. HSS was introduced by F.W. Taylor.
A. true
B. false
.
Answer: A
Explanation: F.W. Taylor introduced the HSS. Full name of F.M. Taylor is Frederick Winslow Taylor.
Q. Which of the following element is included in HSS?
A. tungsten
B. chromium
C. both tungsten and chromium
D. none of the mentioned
.
Answer: C
Explanation: Both are included in HSS. Apart from tungsten and chromium, carbon and manganese are also included in HSS.
Q. How much chromium is there in HSS?
A. 4
B. 14
C. 8
D. 18
.
Answer: A
Explanation: As per the structure of HSS. In the starting mn was used but because of its some drawbacks cr took its place and today it is used.
Q. How much tungsten is there in HSS?
A. 4
B. 14
C. 8
D. 18
.
Answer: D
Explanation: About 18% tungsten is there in HSS. HSS gain its most of property from tungsten and molybdenum.
Q. Which of the following quality does HSS has?
A. toughness
B. formability
C. tensile strength
D. all of the mentioned
.
Answer: D
Explanation: These all are the qualities of HSS. This is used in milling cutters, taps, gear cutters etc.
Q. Which of the following drill is produced power metallurgically?
A. hss
B. cemented carbides
C. diamond
D. none of the mentioned
.
Answer: B
Explanation: As per the construction of cemented carbides. Powder metallurgy is a process in which components are made from metal powder.
Q. Carbides are always coated tools.
A. true
B. false
.
Answer: B
Explanation: This is false. It can be coated or uncoated. It is not mandatory that it must be coated.
Q.. Diamond is used for making very small holes in exotic materials.
A. true
B. false
.
Answer: A
Explanation: It is the property of diamond. Though diamond is the hardest substance it can easily make holes in exotic materials.
Q.. Diamond tools are never used for machining steels.
A. true
B. false
.
Answer: A
Explanation: This is true. If they are used for this purpose, then diamond will be graphitized.
Q. According to size, drill can be classified as______
A. micro drill
B. moderate drill
C. large drill
D. all of the mentioned
.
Answer: D
Explanation: Micro drill, moderate drill and large drill are the types of drill according to size. Generally, this size is expressed in micron or in mm.
Q. When the size of the drill is around 25 to 500 micron,________ is used.
A. micro drill
B. moderate drill
C. large drill
D. none of the mentioned
.
Answer: A
Explanation: Micro drill has a size from 25 to 500 micron as per classification.
Q. When the size of the drill is around 3 to 25 mm,________ is used.
A. micro drill
B. moderate drill
C. large drill
D. none of the mentioned
.
Answer: B
Explanation: Moderate drill has a size of 3 to 25 mm as per the classification.
Q. When the size of the drill is around 25 to 40 mm,________ is used.
A. micro drill
B. moderate drill
C. large drill
D. none of the mentioned
.
Answer: C
Explanation: Generally, the large drill drill has a size from 25 to 40 mm as per classification.
Q. Which of the following drill is most widely used?
A. micro drill
B. moderate drill
C. large drill
D. none of the mentioned
.
Answer: B
Explanation: Moderate type of drill is most widely used as it has medium size of drill- not too large and not too short.
Q. 1 mm = ______ micron.
A. 10
B. 100
C. 1000
D. none of the mentioned
.
Answer: C
Explanation: It is the simple mathematical conversion. 1 mm = 1000 micron and 1 micron = 0.001 mm.
Q. For large drills, large force should be applied.
A. true
B. false
.
Answer: A
Explanation: Large drills need large force as it has large l/d ratio.
Q. In industry, which type of drill is most useful?
A. micro drill
B. moderate drill
C. large drill
D. none of the mentioned
.
Answer: B
Explanation: In industry, moderate type of drill is most widely used as it has medium size of drill and again it doesn’t need large force like large drill.
Q. For large drill, how much torque is needed?
A. small
B. moderate
C. large
D. none of the mentioned
.
Answer: C
Explanation: For large drill large force is needed. As torque=force*displacement so torque is directly proportional to the force. So we need large torque for large drill.
Q. For large drill, firstly hole is made by drill and then it is enlarged by boring operation.
A. true
B. false
.
Answer: A
Explanation: It is the working procedure for making large drill. Drill just make the hole. Boring is specially used for enlarging the drill that has already made by drill.
1Q. Large drill is a mass production machine.
A. true
B. false
.
Answer: B
Explanation: It is used only for specific purpose as it needs very large force and torque.
1Q. Which of the following can be used for mass production?
A. micro drill
B. moderate drill
C. large drill
D. none of the mentioned
.
Answer: B
Explanation: Moderate drill can be used for mass production as it has medium size of drill and it don’t need too large force like large drill.
Q. The flutes are provided for removal of chips.
A. true
B. false
.
Answer: A
Explanation: It is the property of it. There is a sharp blade which is there along with edge of the flute known as teeth.
Q. Which of the following is most commonly used?
A. single flute drill
B. two flute drill
C. three or four flute drill
D. none of the mentioned
.
Answer: B
Explanation: Two flute drill is commonly used because it is very versatile and has wide applications.
Q. Which of the following is rarely used?
A. single flute drill
B. two flute drill
C. three or four flute drill
D. none of the mentioned
.
Answer: A
Explanation: Single flute drill is rarely used as it has very limited applications.
Q. Single flute drill is ______
A. very light
B. very rigid
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: It is very rigid that’s the reason why it has very small applications.
Q. Which of the following is the example of single flute drill?
A. deep hole drill
B. crank shaft hole drill
C. both deep hole drill and crank shaft hole drill
D. none of the mentioned
.
Answer: C
Explanation: Both are examples of single flute drill. Deep hole drilling is used with large length and comparatively small diameter of drill. Crank shaft hole drill has also wide applications.
Q. Which of the following is also known as slot drill?
A. single flute drill
B. two flute drill
C. three or four flute drill
D. none of the mentioned
.
Answer: C
Explanation: Generally 3 or 4 flute drill is also known as slot drill. Slot drill is a double cutting drill with flat end. It has two radial cutting edges.
Q. Gun drill is the example of______
A. single flute drill
B. two flute drill
C. three or four flute drill
D. none of the mentioned
.
Answer: A
Explanation: It can be easily understood from the classification. Gun drill is a fluted drill. These are used deep drilling.
Q. Sometimes soft drills are used to reduce the load path tooth.
A. true
B. false
.
Answer: A
Explanation: It is the application of soft drill. It is not used for heavy purpose. It is used mostly to reduce the load path tooth.
Q. Slot drills are used for making holes with flat ends.
A. true
B. false
.
Answer: A
Explanation: It is the application of slot drill. It consists of two radial edges.
Q. Flutes are the spiral groove, which run to the length of the drill.
A. true
B. false
.
Answer: A
Explanation: This is the property of flute.The flute allows us to remove material from the metal.
Q. Helix angle also governs the rack angle.
A. true
B. false
.
Answer: A
Explanation: This is true. The angle between the helix and axial line on the right is known as helix angel.
Q. For cutting ductile material with a long chip, ______ helixangle is necessary.
A. small
B. moderate
C. long
D. none of the mentioned
.
Answer: C
Explanation: Long helix angle is used for cutting ductile materials with a long chip.
Q. Large helix angle ensures the _______ in cutting force.
A. increment
B. reduction
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: It is the property of it. Helix angles are used in power transfer and in motion conversation in mechanical engineering.
Q. For spade drill, ______ helix angle is used.
A. small
B. large
C. zero
D. none of the mentioned
.
Answer: C
Explanation: Zero helix angle is used for this purpose.Spade drill is a two fluted drill. The external flute provide efficient chip removal.
Q. For hard materials, ______ helix angle is used.
A. small
B. large
C. zero
D. none of the mentioned
.
Answer: A
Explanation: Small helix angle is used for this purpose. In screws, helical gears and warm gears, we uses this helix angle.
Q. For micro drill, ______ helix angle is used.
A. small
B. large
C. zero
D. none of the mentioned
.
Answer: C
Explanation: Zero helix angel is used for this purpose. Helix angel is like a angel between tangent to a helix and an axial line on the right.
Q. Which helix angle is used for deep hole drilling?
A. small
B. large
C. zero
D. none of the mentioned
.
Answer: B
Explanation: Large helix angel is used for this purpose. Zero helix angel are used for small drilling.
Q. Which helix angle is used for making holes in very soft materials?
A. small
B. large
C. zero
D. none of the mentioned
.
Answer: B
Explanation: Large helix angel is used for this purpose as it can make make deep holes easily without any extra effort.
Q. According to the helix angel of the flutes, drill can be classified as_____
A. small helix
B. large helix
C. zero helix
D. all of the mentioned
.
Answer: D
Explanation: Drill can be classified in number of ways. based on helix angel, based on number of flutes, based on materials, based on size on so on. Based on helix angel, it can be classified as small helix, large helix and zero helix.
Q. If we increase the helix angle, strength of drill will______
A. increase
B. decrease
C. not affected
D. none of the mentioned
.
Answer: B
Explanation: There is an inverse relationship between helix angel and strength of drill. If we increase the helix angel, strength of drill will decrease and vice versa.
1Q.Chip disposal will be better If we _______ the helix angle.
A. increase
B. decrease
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: It is the property of helix angel and if we decrease the helix angel it will affect chip disposal rate in a negative way.
1Q. What is the range of the usual helix angle?
A. 10 to 25
B. 20 to 35
C. 45 to 60
D.none of the mentioned
.
Answer: B
Explanation: 20 to 35-This is the usual range for usual helix angel.
1Q. What is the range of the large helix angle?
A. 10 to 25
B. 20 to 35
C. 45 to 60
D. none of the mentioned
.
Answer: C
Explanation: 45 to 60-This is the usual range for usual helix angel.
1Q. If we increase the helix angle, rack angle will______
A. increase
B. decrease
C. not affected
D. none of the mentioned
.
Answer: A
Explanation: There is a direct relationship between helix angel and rack angel. If we increase the helix angel, rack angel will also increase and vice versa.
Q. If l/d ratio is too large, then drill becomes_______
A. weak
B. strong
C. very sharp
D. none of the mentioned
.
Answer: A
Explanation: The large l/d ratio weaken the drill. If we have very long drill with small diameter then it can’t perform drilling operation more accurately.
Q. If l/d ratio is too short, then chip removal will be difficult.
A. true
B. false
.
Answer: A
Explanation: Chip removal will be difficult if this ratio is too short. Short l/d ratio weakens the drilling and reduce the performance. So the chip removal will be difficult.
Q. Long drills are used for deep holes.
A. true
B. false
.
Answer: A
Explanation: As per the definition of long drill. Long drills has high l/d ration. So it can make high deeply holes.
Q. For general purpose, l/d ratio should be_____
A. 5 to 10
B. 10 to 20
C. more than 20
D. none of the mentioned
.
Answer: A
Explanation: For general purpose, the ratio should be 5 to Q. The drills containing these ratio generally used in ordinary performances.
Q. Which of the following can also be termed as center drill?
A. general drill
B. short drill
C. long drill
D. none of the mentioned
.
Answer: B
Explanation: Short drill can also be termed as centerr drill.
Q. For long drills, l/d ratio should be more then 2Q.
A. true
B. false
.
Answer: A
Explanation: For long drills, this ratio should be more than 2Q. For general purpose it should have ratio of 5 to Q.
Q. For small drill, l/d ratio should be 8 to Q.
A. true
B. false
.
Answer: B
Explanation: This is false. For small drill, l/d ratio should be 2 or Q.
Q. According to the shank type, drill can be classified as______
A. straight shank
B. taper shank
C. both taper shank and straight shank
D. none of the mentioned
.
Answer: C
Explanation: Both taper shank and straight shank are the type of shank drill. Brace shank, straight shank, hex shank etc. are the type of shanks.
Q. In ______ type, drill is held in spindle directly.
A. straight shank
B. taper shank
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: In taper type, drill is held in spindle directly. Taper shank drill is like a general purpose drill.
Q. In _______ type, drill is held in chuck.
A. straight shank
B. taper shank
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: In straight type, drill is held in chuck. It is also known as reduced shank or blacksmith’s drill.
Q. According to specific use, drill can be classified as______
A. center drill
B. step drill
C. both center drill and step drill
D. none of the mentioned
.
Answer: C
Explanation: Both are the examples of specific use drill. These special purpose drilling machines are intended for drilling multiple holes at a single setting.
Q. Subland drill is type of drill according to______
A. l/d ratio
B. shank type
C. specific use
D. none of the mentioned
.
Answer: C
Explanation: Subland drill is the example of special purpose drilling machine. Apart from this, turret, micro drill press and muliple spindle drilling machines are also an example of specific purpose drilling machine.
Q. Which of the following drill is very short drill?
A. center drill
B. subland drill
C. step drill
D. none of the mentioned
.
Answer: A
Explanation: Center drill is very short drill. Subland drill and step drill are large as compare to center drill.
Q. Which of the following is not true for center drill?
A. the hole is used to support the center
B. it is the type of drill according to specific use
C. one taper has to be made here
D. none of the mentioned
.
Answer: D
Explanation: All the mentioned sentences are true. It has a taper and also it is a specific purpose drill machine. It is short drill.
Q. In center drill, center has to be mounted on______
A. headstock
B. tailstock
C. headstock or tailstock
D. none of the mentioned
.
Answer: C
Explanation: The center can be mounted on either headstock or tailstock. Headstock and tailstock both are mounted on the bed.
Q. In which of the following, l/d ratio is very long?
A. half round drill
B. gun drill
C. both half round drill and gun drill
D. none of the mentioned
.
Answer: C
Explanation: Here l=length and d=diameter. In both half round drill and gun drill this ratio is very long as they have large value of length as compare to diameter.
Q. How many cutting edges are there in half round drill and gun drill?
A. one
B. two
C. may be one or two
D. none of the mentioned
.
Answer: A
Explanation: One edge is there in these both half round drill and gun drill. In these both drills, diameter is less as compare to length.
Q. How many flutes are there in half round drill and gun drill?
A. one
B. two
C. may be one or two
D. none of the mentioned
.
Answer: C
Explanation: One or two flutes are there in these both machines. These both machines are specific purpose machines used for a specific purpose.
Q. In half round drill, base is weak.
A. true
B. false
.
Answer: B
Explanation: This is false. The base is very strong in half round drill.
Q. Which of the following is a pipe like cutting tool?
A. center drill
B. half round drill
C. gun drill
D. none of the mentioned
.
Answer: D
Explanation: Trepanning tool has this structure. It structure looks like a pipe.
1Q. Trepanning is feasible for hard materials.
A. true
B. false
.
Answer: B
Explanation: This is false. Trepanning is not feasible for hard materials. It is feasible for soft material.
Q. Which of the following are the cutting parameters used in drill?
A. cutting speed
B. feed
C. depth of cut
D. all of the mentioned
.
Answer: D
Explanation: All are the cutting parameters used in drill. Apart from these parameters, machining time, metal removal rate are also cutting parameters which are used in drill.
Q. Which of the following is considered as the peripheral speed of the drill?
A. cutting speed
B. feed
C. depth of cut
D. none of the mentioned
.
Answer: A
Explanation: This is the definition of cutting speed. If you know the diameter of the drill and rpm of the drill, you can easily calculate the cutting speed.
Q. Cutting speed generally express in_____
A. meter
B. meter/minute
C. meter*minute
D. none of the mentioned
.
Answer: B
Explanation: Cutting speed is simply a speed. So, its unit should be match with speed’s unit.
Q. Formula for cutting speed is______
d=diameter of drill in mm, n=rpm of drill.
A. (d*n)/1000
B. (Q.14*d*n)/1000
C. Q.14*d*n
D. none of the mentioned
.
Answer: B
Explanation: Though cutting speed is peripheral speed the distance covered through it must be equal to Q.14*d. N is rpm and 1000 is there as we are measuring it in mm.
Q. The ______ of a drill is the distance the drill moves into the work at each revolution of the spindle.
A. depth of cut
B. feed
C. cutting speed
D. none of the mentioned
.
Answer: B
Explanation: This is the definition of feed. It is a distance/revolution.
Q. The feed may be expressed in______
A. mm/revolution
B. mm*revolution
C. mm
D. none of the mentioned
.
Answer: A
Explanation: As per its definition, feed is the distance per revolution. So its unit should be match with this formula..
Q. ______ is equal to half the diameter of the drill used.
A. feed
B. depth of cut
C. machining time
D. none of the mentioned
.
Answer: B
Explanation: This is the definition of depth of cut. Its simply a distance. Here one point is there, we always talk in terms of diameter in drill, never in terms of radius.
Q. Depth of cut can be expressed in______
A. mm
B. mm/revolution
C. mm/minute
D. none of the mentioned
.
Answer: A
Explanation: It is simply a distance and so its unit should be match with distance’s unit.
Q. The formula for depth of cut is______
d=diameter of the drill.
A. d/4
B. d/2
C. d
D. 2d
.
Answer: B
Explanation: Depth of cut is equal to half the diameter of the drill used. So if d is the diameter of drill then its formula must be equal to d/Q..
Q. If s2=feed per revolution, s1=feed per minute, n=rpm.
Which of the following is mathematically right?
A. s1=s2*n
B. s2=s1*n
C. s1*s2=n
D. none of the mentioned
.
Answer: A
Explanation: It can be solved by equating units both sides. Left side unit = feed/minute and Right side unit = feed / revolution * revolution/minute. So overall unit of right side = feed/minute. So, left side unit=right side unit.
1Q. Machining time is expressed in______
A. mm/minute
B. minute*minute
C. minute
D. none of the mentioned
.
Answer: C
Explanation: Machining time is simply a time. So its unit must be match with time’s unit.
1Q. If l=length of travel of the drill in mm, n=rpm of the drill, s= feed per revolution of the drill in mm. Then machining time can be given as_____
A. (l*n)/s
B. (l*s)/n
C. l/(n*s)
D. none of the mentioned
.
Answer: C
Explanation: L/(n*s)- This is the right formula for calculating machining time. Here l is expressed in mm, n is revolution/minute and s is expressed in mm. So by putting these all units in machining time’s formula we get the unit of the whole expression as minute. So our formula is right.
1Q. Metal removal rate can be given as_____
A. (mm*mm*mm)/min
B. (mm*mm*m)/revolution
C. mm/revolution
D. mm/minute
.
Answer: A
Explanation:
Metal removal rate = area of metal removed*rpm*feed/revolution and it equal to (Q.14*d^2/4)*n*feed/revolution. From this, we can easily derive the expression.
Q. Which of the following operation is performed to ensure the correct location of a hole by making it concentric with the axis of rotation?
A. parting
B. tapping
C. boring
D. none of mentioned
.
Answer: C
Explanation: This is the characteristic of boring. After the hole is made by drilling operation, boring is carried out. It is generally done to enlarge the diameter of the hole.
Q. Which of the following operations can be done by same tool?
A. reaming and tapping
B. drilling and facing
C. counterboring and spot facing
D. none of the mentioned
.
Answer: C
Explanation: Counterboring and spot facing can be performed by same tool. Counter boring is an operation which nis carried out for providing recess for nuts or bolt heads.
Q. Reaming doesn’t improve the surface finish.
A. true
B. false
.
Answer: B
Explanation: Reaming improves the surface finish. It generally enlarge the holes with great accuracy and give better dimensional accuracy-better surface finish.
Q. Which of the following process is performed to provide seating for washer?
A. counterboring
B. spot facing
C. tapping
D. none of the mentioned
.
Answer: B
Explanation: As per the definition of spot facing process. In spot facing operation, some specific part of the workpiece is faced. It gives better flat,smooth surface to that workpiece.
Q. To produce more accurate holes, which of the following operation should be performed first?
A. drilling
B. reaming
C. centering
D. boring
.
Answer: C
Explanation: As per the characteristic of all these operation, centering should be performed first before drilling, reaming and boring in order to produce more accurate holes. Center drill makes a hole. Now, this hole behave as a center of rotation for mentioned rest 3 operations.
Q. To produce more accurate holes, which of the following operation should be performed last?
A. drilling
B. reaming
C. centering
D. boring
.
Answer: B
Explanation: As per the characteristic of all these operation, reaming should be performed last in order to produce more accurate holes. By using all rest 3 method, we make the hole with almost accuracy. But for final finish and extremely high accuracy, reaming is performed at the last.
Q. Tapping is a forming process.
A. true
B. false
.
Answer: A
Explanation: As per the definition of taping process. The main advantage of taping is that is requires less operating conditions.
Q. Which of the following process requires abundant coolant?
A. drilling
B. tapping
C. boring
D. none of the mentioned
.
Answer: B
Explanation: Tapping needs abundant coolant. Cutting fluid is the coolant generally designed for metal working process.Different types of fluids are there like oil, gel, aerosols and so on.
Q. Tapping process is carried out on ______ machines.
A. drilling
B. tapping
C. both drilling and tapping
D. none of the mentioned
.
Answer: C
Explanation: Tapping process is carried out on both drilling and tapping machines. Taper is a shape which is produced and it has different diameter at both the ends
Q. Which of the following operation is carried out for cutting internal threads?
A. drilling
B. tapping
C. boring
D. none of the mentioned
.
Answer: B
Explanation: Tapping is carried out for cutting internal threads because tapping process generally don’t need high operating conditions. They require less operating conditions.
Q. Tapping is carried out by using tap tool.
A. true
B. false
.
Answer: A
Explanation: As per the definition of this process. A tap is also applied for cutting and forming female part of the mating pair like nuts.
Q. Which of the following operation is carried out to make the hole dimensionally more accurate?
A. reaming
B. tapping
C. boring
D. none of mentioned
.
Answer: A
Explanation: Reaming is used for this purpose. Reaming also improve the surface finish which is its extra advantage.
Q. Which of the following operation is performed to provide recess for bolt heads or nuts?
A. counterboring
B. spot facing
C. tapping
D. none of the mentioned
.
Answer: A
Explanation: As per the definition of counterboring process. Generally, counter boring is a process carried out for delivering recess for nuts etc.
Q. Reaming is carried out by using a reamer.
A. true
B. false
.
Answer: A
Explanation: It is carried out by a reamer. Reamer is a cutting tool generally used for enlarging the hole with great accuracy.
Q. Which of the following process is carried out to provide seating for head of screw?
A. counterboring
B. countersinking
C. tapping
D. none of the mentioned
.
Answer: B
Explanation: As per the definition of countersinking process. To make the cone or taper shape at the entrance of the hole, this process is used.
Q. Countersinking process is carried out by using countersink tool.
A. true
B. false
.
Answer: A
Explanation: Countersink tool is used for countersinking process. Counter sinks are available as single flute and and multi flute tools.
Q. Taping process employs high operating conditions.
A. true
B. false
.
Answer: B
Explanation: This is false. Taping process employs low operating conditions.
Q. To produce more accurate holes, which of the following operation should be performed third?
A. drilling
B. reaming
C. centering
D. boring
.
Answer: D
Explanation: As per the characteristic of all these operation, boring should be performed third in order to produce more accurate holes. Boring is used to make hole of size for which drill is not available. It generally enlarge the hole.
Q. To produce more accurate holes, which of the following operation should be performed second?
A. drilling
B. reaming
C. centering
D. boring
.
Answer: A
Explanation: As per the characteristic of all these operation, drilling should be performed second in order to produce more accurate holes. Drilling doesn’t make hole of exact dimension and accuracy. For exact dimension boring is carried out and for final dimensional accuracy reaming is carried out.
Q. Which of the following operation is used to enlarge the previously drilled hole?
A. reaming
B. tapping
C. boring
D. none of mentioned
.
Answer: C
Explanation: Boring is used for this purpose. Apart from this, boring aslo insures the exact location of a hole. It makes the hole concentric with the axis of rotation.
Q. A hole is being drilled with 5 mm drill at a feed of 0.1 mm/revolution and rpm is 200. Calculate the metal removal rate (m) in mm3/minute.
A. 39Q.5
B. 785
C. 1570
D. none of the mentioned
.
Answer: A
Explanation: Here, we have the value of diameter, feed and rpm. So, from the formula, m= ( Q.14*d*d*f*n) / 4, we can easily get the value of metal removal rate.
Q. If drill is Q.5 mm, feed is 0.35 mm/revolution and metal removal rate is 40 mm3/minute. Then find out the value of rpm.
A. 4Q.6
B. 2Q.3
C. 9Q.2
D. 1Q.65
.
Answer: B
Explanation: From the formula, m= ( Q.14*d*d*f*n) / Q. From this formula, we can easily calculate rpm. Rpm means revolution per minute.
Q. If drill is Q.5 mm, metal removal rate is 65 mm3/minute and rpm is 130.Then find the value of feed in mm/revolution.
A. 0.02
B. 0.2
C. 0.04
D. 0.4
.
Answer: A
Explanation: Feed is the distance the drill moves into the work at each revolution of the spindle. From the formula, m= ( Q.14*d*d*f*n) / 4, we can easily calculate feed.
Q. If metal removal rate is 120 mm3/minute, rpm is 105 and feed is 0.1 mm/revolution. Then find the value of drill in mm.
A. 1Q.6
B. Q.8
C. Q.6
D. Q.9
.
Answer: B
Explanation: From the formula, m= ( Q.14*d*d*f*n) / 4, we can calculate the value of drill.
Q. If value of the diameter of the drill (d2) = 10mm, then find the value of the depth of cut (d1).
A. 5
B. 10
C. 20
D. none of the mentioned
.
Answer: A
Explanation: Value of diameter of the drill is always twice to that the value of the depth of cut. From the formula, d1= d2/Q.
Q. The diameter of the drill is 15 mm and rpm of drill is Q. Find the value of cutting speed in meter/minute.
A. 23Q.5
B. 0.2355
C. 0.075
D. 75
.
Answer: B
Explanation: From the formula, cs = (Q.14*d*n) /1000. Cutting speed is the peripheral speed of the drill.
Q. Rpm is 10 and feed per revolution (f2) is Q. Then find the value of feed per minute (f1).
A. 2
B. 4
C. 1
D. none of the mentioned
.
Answer: D
Explanation: Rpm = f1/fQ. Here rpm=10 and f2=Q. So value of f1 should be 50.
Q. If depth of cut is 20 mm, then find the value of diameter of the drill.
A. 10
B. 20
C. 40
D. none of the mentioned
.
Answer: C
Explanation: Depth of cut=diameter/Q. It is simply a distance.
Q. Feed per minute (f1) is 20 and rpm (n) is Q. Then find the value of feed per revolution (f2).
A. 2
B. 4
C. 1
D. 0.5
.
Answer: B
Explanation: Rpm = f1/fQ. Here f1=20 and n=Q. So, f2 should be Q.
Q. If t=2minute, n=2rpm and s=5 mm. Then find the value of l. t=machining time in minute, l=length of travel of the drill in mm, n= rpm of the drill and s=feed per revolution of the drill in mm.
A. 5
B. 10
C. 20
D. none of the mentioned
.
Answer: C
Explanation: From the formula, t= l / (n*s). Here t=2, n=2 and s=Q. Put all these values with their units in the mentioned equation,you will easily get the answer as 20 mm.
1Q. If d=2, n=1 and f=Q. Then find the value of m. d= diameter of drill in mm, n=rpm, f=feed per revolution in mm and m=metal removal rate in mm3/minute.
A. Q.14
B. Q.28
C. 1Q.56
D. none of the mentioned
.
Answer: B
Explanation: From the formula, m= (Q.14*d*d*n*f) / 4, we can easily get the value of m. Metal removal rate means the rate at which the metal is removed during the operation.
1Q. If d=2, n=2 and m=Q. Then find the value of f. d= diameter of drill in mm, n=rpm, f=feed per revolution in mm and m=metal removal rate in mm3/minute.
A. 0.238
B. 0.477
C. 0.119
D. none of the mentioned
.
Answer: B
Explanation: From the formula, m= (Q.14*d*d*n*f) / 4, we can easily get the value of feed. Feed may also be expressed as feet per minute or mm/minute.
1Q. If m=5, n=2 and f=Q. Then find the value of m. d= diameter of drill in mm, n=rpm, f=feed per revolution in mm and m=metal removal rate in mm3/minute.
A. Q.03
B. Q.065
C. 0.266
D. none of the mentioned
.
Answer: B
Explanation: From the formula, m= (Q.14*d*d*n*f) / 4, we can easily find the value of m.
1Q. If cs=0.942 and d=60, then find the value of n. d=diameter of drill in mm, n=rpm and cs=cutting speed in mm/minute.
A. 1Q.7
B. 15700
C. 5
D. 5000
.
Answer: C
Explanation: From the formula, cs = (Q.14*d*n) /1000, we can easily find value of n. N means rpm-revolution per minute. It is an important term in any operation.
Q. A hole is being drilled with Q.5mm drill at a feed of 0.3 mm/revolution and rpm is 70. Calculate the metal removal rate in mm3/minute.
A. 1Q.5
B. 37
C. 74
D. 148
.
Answer: B
Explanation: Metal removal rate means the rate at which the metal is removed during the operation. From the formula, m= ( Q.14*d*d*f*n) / 4, we can easily calculate metal removal rate.
Q. If drill is 2 mm, feed is 0.2 mm/revolution and metal removal rate is 50 mm^/minute. Then find out the value of rpm.
A. 31Q.4
B. 15Q.2
C. 7Q.6
D. 3Q.8
.
Answer: C
Explanation: From the formula, m= ( Q.14*d*d*f*n) / Q. Put all the given values with their respective units in the above equation and you will get the value of n as 7Q.6 .
Q. If drill is Q.15 mm, metal removal rate is 55 mm3/minute and rpm is 170.Then find the value of feed in mm/revolution.
A. 0.02
B. 0.2
C. 0.04
D. 0.4
.
Answer: C
Explanation: During each revolution of spindle drill moves into the work. That distance is known as the feed.From the formula, m= ( Q.14*d*d*f*n) / Q.
Q. If metal removal rate is 100 mm3/minute, rpm is 165 and feed is 0.01 mm/revolution. Then find the value of drill in mm.
A. Q.78
B. Q.41
C. 1Q.3
D. 7Q.8
.
Answer: A
Explanation: From the formula, m= ( Q.14*d*d*f*n) / Q. By substituting all the given values in the above equation, we can easily get the value of drill.
Q. If diameter of the drill is 20 mm. Then find the value of depth of cut in mm.
A. 20
B. 10
C. 40
D. none of the mentioned
.
Answer: B
Explanation: Depth of cut=diameter/Q. Depth of cut is equal to half the diameter of the drill used.
Q. The diameter of the drill is 20 mm and rpm of drill is Q. Find the value of cutting speed in meter/minute.
A. 0.628
B. 628
C. 0.2
D. 200
.
Answer: A
Explanation: From the formula, cs = (Q.14*d*n) /1000. Cutting speed in a drilling operation is taken as the peripheral speed of the drill.
Q. Feed per minute (f1) is 10 and feed per revolution (f2) is Q. Then find the value of rpm.
A. 2
B. 4
C. 1
D. 0.5
.
Answer: A
Explanation: Rpm = f1/fQ. Here, f1=10 and f2=Q. We can easily get the value of rpm as Q.
Q. If the depth of cut (d1) is 10mm, then find the value of the diameter of the drill (d2).
A. 5
B. 10
C. 20
D. none of the mentioned
.
Answer: C
Explanation: From the formula, d1= d2/Q. Here d1=Q. So, d2 sholud be Q.
Q. If l=10mm, n=2 rpm and s=5 mm. Then find the value of t. t=machining time in minute, l=length of travel of the drill in mm, n= rpm of the drill and s=feed per revolution of the drill in mm.
A. 0.5
B. 1
C. 2
D. none of the mentioned
.
Answer: B
Explanation: From the formula, t= l / (n*s). By putting all the given values in the above equation, we can easily get the value of machining time as 1 minute.
Q. If l=10mm, n=2 rpm and t=0.5 minute. Then find the value of s. t=machining time in minute, l=length of travel of the drill in mm, n= rpm of the drill and s=feed per revolution of the drill in mm.
A. 5
B. 10
C. 20
D. none of the mentioned
.
Answer: B
Explanation: From the formula, t= l / (n*s), we can calculate the feed per revolution. Feed per revolution may be defined as the axial distance moved by the drill into the work per revolution.
1Q. If l=20 mm, t=2 minute and s=5 mm. Then find the value of t. t=machining time in minute, l=length of travel of the drill in mm, n= rpm of the drill and s=feed per revolution of the drill in mm.
A. 0.5
B. 1
C. 2
D. none of the mentioned
.
Answer: C
Explanation: From the formula, t= l / (n*s). Substitute all the given values in the above equation and you can get the value of t as Q.
1Q. If d=1, n=1 and f=Q. Then find the value of m. d= diameter of drill in mm, n=rpm, f=feed per revolution in mm and m=metal removal rate in mm3/minute.
A. 0.08
B. 1
C. 0.3184
D. none of the mentioned
.
Answer: C
Explanation: From the formula, m= (Q.14*d*d*n*f) / Q. Here d,n and f are given. Substitute these values in above equation, you will easily get value of m as 0.3184 .
1Q. If d=2, n=4 and f=Q. Then find the value of m. d= diameter of drill in mm, n=rpm, f=feed per revolution in mm and m=metal removal rate in mm3/minute.
A. 0.798
B. 1
C. 0.6369
D. none of the mentioned
.
Answer: A
Explanation: From the formula, m= (Q.14*d*d*n*f) / Q. Substitute all tyhe given values in the above equation and you will easily get the value.
1Q. If cs=1 and n=40, then find the value of d. d=diameter of drill in mm, n=rpm and cs=cutting speed in mm/minute.
A. Q.96
B. Q.98
C. 1Q.92
D. none of the mentioned
.
Answer: A
Explanation: From the formula, cs = (Q.14*d*n) /1000. Substitute all tyhe given values in the above equation and you will easily get the value of d.
Q. Which of the following is used for machining larger jobs?
A. shaper
B. planer
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: Planer is used for the purpose of machining too large and heavy jobs. There is a table in planer known as platen on which the work piece is fixed firmly and the operation is performed.
Q. Which of the following is used for machining smaller jobs?
A. shaper
B. planer
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: Shaper is used for the purpose of machining smaller jobs. It is mainly used for producing flat and plan surfaces.
Q. Which of the following machine is primarily intended for producing flat surfaces?
A. shaper
B. drilling
C. lathe
D. none of the mentioned
.
Answer: A
Explanation: Shaper is intended for this purpose. It was invented in 1836 by James Nasmyth.
Q. Which of the following operation can be performed in shaper?
A. gear cutting
B. keyways cutting
C. curvilinear contours
D. all of the mentioned
.
Answer: D
Explanation: All mentioned operations can be performed in shaper. Although it is used mainly for producing flat surfaces but its a versatile machine and can be used for other purposes too.
Q. In shaper, the job is kept_____
A. stationary
B. rotating
C. reciprocating
D. none of the mentioned
.
Answer: A
Explanation: The job is kept stationary in this machine. In shaper, cutting tool moves in order to perform operations.
Q. In shaper, the cutting tool is made to reciprocate across the job.
A. true
B. false
.
Answer: A
Explanation: This is true. cutting tool moves in order to perform the work. Only forward movement is useful. Work is only done in forward movement.
Q. Which stroke is cutting stroke in shaper?
A. forward
B. return
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: Forward stroke is cutting stroke in shaper because only in forward stroke work-cutting is done.
Q. Which stroke is idle stroke in shaper?
A. forward
B. return
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: Return stroke is idle stroke in shaper because no useful work is done in this stroke.
Q. No useful work is done in forward stroke in shaper.
A. true
B. false
.
Answer: B
Explanation: In return stroke, no useful work is done. The return stroke is also known as idle stroke.
Q. At the end of one cycle, job is given a feed motion______ to the direction of tool movement.
A. parallel
B. perpendicular
C. anti-parallel
D. none of the mentioned
.
Answer: B
Explanation: At the end of one cycle, job is given a feed motion perpendicular to the direction of tool movement. Feed is the relative movement of the tool or work.
1Q. The depth of cut is given by lowering the tool relative to the job.
A. true
B. false
.
Answer: A
Explanation: This is true. Depth of cut is the thickness of metal that is removed in one cut.
