Preventive Maintenance in Foundries & Metal Casting Process:
Q. Which of the following is not an important condition for preventive maintenance?
A. Size
B. Age
C. Location
D. Oils used
.
Answer: D
Q. What is the ratio of preventive maintenance and total maintenance in primary-metal industry?
A. 1 : 1.27 men
B. 1 : 2.17 men
C. 1 : 2.37 men
D. 1 : 3.17 men
.
Answer: C
Q. Which of the following is not counted among safety equipment?
A. Vacuum reliever
B. Alarms
C. Flashback arresters
D. Temperature reliever
.
Answer: D
Q. What is the ratio of preventive maintenance and total maintenance in machinery-manufacturing industry?
A. 1 : 10 men
B. 1 : 2.69 men
C. 1 : 2.37 men
D. 1 : 3.77 men
.
Answer: B
Q. Which of the following is not a material handling equipment?
A. Cranes
B. Lifts
C. Tongs
D. Hoists
.
Answer: C
Q. What is the ratio of preventive maintenance and total maintenance in general manufacturing industry?
A. 1 : 10 men
B. 1 : 2.69 men
C. 1 : 2.37 men
D. 1 : 3.77 men
.
Answer: A
Q. Which of the following materials is not used as process equipment?
A. Furnace
B. Compressor
C. Pump
D. Generator
.
Answer: D
Q. Which of the following are not counted among periodic inspection?
A. Tear downs
B. Overhauls
C. Oil burnings
D. Replacement of parts
.
Answer: C
Q. Preventive maintenance and its application is an expensive process.
A. True
B. False
.
Answer: A
Q. Frequency of inspection is decided on the basis of overloading.
A. True
B. False
.
Answer: A
Q. A pattern is generally made up of how many pieces?
A. 1
B. 2-3
C. 4-5
D. 6
.
Answer: B
Q. How does pattern vary in size with casting?
A. Pattern is larger in size
B. Casting is larger in size
C. Both have same size
D. Size depends on other factors
.
Answer: A
Q. A pattern carries which allowance for internal and external surfaces?
A. Shrinkage allowance
B. Machining allowance
C. Distortion allowance
D. Draft allowance
.
Answer: D
Q. What is draft allowance also known as?
A. Shake allowance
B. Contraction allowance
C. Taper Allowance
D. Rapping Allowance
.
Answer: C
Q. Machining allowance does not depend on which of the following factor?
A. Solidifying contraction
B. Machining method
C. Shape and size of casting
D. Casting method
.
Answer: A
Q. How much does the distortion allowance vary?
A. 1mm to 10mm
B. 2mm to 20mm
C. 1mm to 15mm
D. 2mm to 15mm
.
Answer: B
Q. Shrinkage allowance does not depend on which of the following factor?
A. Moulding method
B. Casting dimension
C. Pouring temperature of molten metal
D. Amount of finish required
.
Answer: D
Q. Ferrous metals need more allowance than non-ferrous metals.
A. True
B. False
.
Answer: A
Q. A pattern is shaken by striking it with a wooden piece. A negative allowance is provided for this. Which allowance is it?
A. Machining Allowance
B. Rapping Allowance
C. Distortion Allowance
D. Contraction Allowance
.
Answer: B
Q. When the molten metal is put into the mold, what is that temperature called?
A. Melting temperature
B. Vapourising temperature
C. Pouring temperature
D. Room temperature
.
Answer: C
Q.In any flow through a system, if the area of cross section in which the metal is flowing, decreases, how will it affect the velocity?
A. Increases
B. Decreases
C. No affect
D. Quantities not related
.
Answer: A
Q. What is the shape of the sprue?
A. Cuboidal
B. Cubicle
C. Trapezoidal
D. Spherical
.
Answer: C
Q. According to Bernoulli’s theorem, energies at two points in a flowing liquid are equal.
A. True
B. False
.
Answer: A
Q. For casting operation, a metal must be heated to what temperature?
A. Above solidifying temperature
B. Above vapourising temperature
C. Above melting temperature
D. Above room temperature
.
Answer: C
Q. Which of the following is not a furnace used for heating?
A. Cupola furnace
B. Crucible furnace
C. Electric arc furnace
D. Blow air furnace
.
Answer: D
Q. Heat required to raise the temperature to the melting point is called what?
A. Sensible heat
B. Latent heat
C. Calorific heat
D. Specific heat
.
Answer: A
Q. The heat needed for a change of state of a material without changing the temperature is called what?
A. Sensible heat
B. Latent heat
C. Calorific heat
D. Specific heat
.
Answer: B
Q. If there is an increase in the mass of the metal being heated, how would it affect the total heat energy required to raise the temperature of metal?
A. Increases
B. Decreases
C. No affect
D. Quantities not related
.
Answer: A
Q. In pressure die casting, what is the minimum pressure that can be applied?
A. 50 kg/cm2
B. 60 kg/cm2
C. 70 kg/cm2
D. 80 kg/cm2
.
Answer: C
Q. What is the maximum pressure, which can be applied in a pressure die casting?
A. 4530 kg/cm2
B. 4980 kg/cm2
C. 5000 kg/cm2
D. 5100 kg/cm2
.
Answer: C
Q. Alloys of which of the following metal is not used for hot chamber die casting?
A. Tin
B. Lead
C. Zinc
D. Iron
.
Answer: D
Q. In cold chamber die casting, what is the minimum pressure that can be applied?
A. 140 kg/cm2
B. 180 kg/cm2
C. 150 kg/cm2
D. 200 kg/cm2
.
Answer: D
Q. In cold chamber die casting, what is the maximum pressure that can be applied?
A. 500 kg/cm2
B. 1000 kg/cm2
C. 1500 kg/cm2
D. 2000 kg/cm2
.
Answer: D
Q. In hot chamber die casting, before the end of the stroke, what uncovers the port?
A. Injector
B. Plunger
C. Burning flame
D. Die cavity
.
Answer: B
Q. Which of the following is not counted among the limitations of pressure die casting?
A. Only small parts can be produced
B. High cost
C. Low scale production
D. Castings are porous
.
Answer: C
Q. Up to what tolerances can pressure die casting be possible?
A. ± 0.067mm
B. ± 0.076mm
C. ± 0.025mm
D. ± 0.052mm
.
Answer: B
Q. Up to what thickness can the sections be casted?
A. 0.3mm
B. 0.4mm
C. 0.5mm
D. 0.6mm
.
Q. In pressure die castings, production rate is low.
A. True
B. False
.
Answer: B
