MCQ’s On 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.
