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CAT - Manufacturing & Production Engineering 1000+ MCQ [Solved] PDF Download

Thursday 9th of March 2023

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1. In which of the following machine, the work is usually rotated while the drill is fed into work?
A. Sensitive drilling machine
B. Radial drilling machine
C. Gang drilling machine
D. Deep hole drilling machine
Answer : D
2. In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to
A. Circular interpolation in counter clockwise direction and incremental dimension
B. Circular interpolation in counter clockwise direction and absolute dimension
C. Circular interpolation in clockwise direction and incremental dimension
D. Circular interpolation in clockwise direction and absolute dimension
Answer : C
3. The tap used to cut threads in a blind hole is
A. Taper tap
B. Second tap
C. Bottoming tap
D. Any one of these
Answer : C
4. Any number of equal divisions can be obtained on milling machine by
A. Direct indexing
B. Simple indexing
C. Compound indexing
D. Differential indexing
Answer : B
5. The chamfering is an operation of
A. Bevelling the extreme end of a workpiece
B. Embossing a diamond shaped pattern on the surface of a workpiece
C. Reducing the diameter of a workpiece over a very narrow surface
D. Enlarging the end of a hole cylindrically
Answer : A
6. The chuck used for setting up of heavy and irregular shaped work should be
A. Four jaw independent chuck
B. Three jaw universal chuck
C. Magnetic chuck
D. Drill chuck
Answer : A
7. The trade name of a nonferrous cast alloy composed of cobalt, chromium and tungsten is called
A. Ceramic
B. Stellite
C. Diamond
D. Cemented carbide
Answer : B
8. The factor which affects the tool life is
A. Tool geometry
B. Cutting speed
C. Feed rate
D. All of these
Answer : D
9. The maximum possible draft in cold rolling of sheet increases with the
A. Increase in coefficient of friction
B. Decrease in coefficient of friction
C. Decrease in roll radius
D. Decrease in roll velocity
Answer : A
10. The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap.
A. Equal to
B. Smaller than
C. Greater than
D. None of these
Answer : B
11. In ECM, the material removal is due to
A. Corrosion
B. Erosion
C. Fusion
D. Ion displacement
Answer : D
12. In electro discharge machining, tool is made of
A. Brass
B. Copper
C. Copper tungsten alloy
D. All of these
Answer : D
13. The angle made by the face of the tool and the plane parallel to the base of cutting tool is called
A. Rake angle
B. Cutting angle
C. Clearance angle
D. Lip angle
Answer : A
14. In metal machining, the work-tool contact zone is a zone where heat is generated due to
A. Plastic deformation of metal
B. Burnishing friction
C. Friction between the moving chip and the tool face
D. None of the above
Answer : B
15. Cast iron during machining produces
A. Continuous chips
B. Discontinuous chips
C. Continuous chips with built-up edge
D. None of these
Answer : B
16. Buffing wheels are made of
A. Softer metals
B. Cotton fabric
C. Carbon
D. Graphite
Answer : B
17. The lip angle is the angle
A. Between the tool face and the ground end surface of flank
B. Made by the face of the tool and the plane parallel to the base of the cutting tool
C. Between the face of the tool and a line tangent to the machined surface at the cutting point
D. None of the above
Answer : A
18. A dense structure of a grinding wheel is used for
A. Hard materials
B. Brittle materials
C. Finishing cuts
D. All of these
Answer : D
19. The high cutting speed and large rake angle of the tool will result in the formation of
A. Continuous chips
B. Discontinuous chip
C. Continuous chips with built up edge
D. None of these
Answer : A
20. While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is
A. Independent of index change gear ratio
B. Dependent on speed change gear ratio
C. Interrelated to index change gear ratio
D. Independent of speed and index change gear ratio
Answer : C
21. In grinding irregular, curved, tapered, convex and concave surfaces, the grinder used is
A. Cylindrical grinder
B. Internal grinder
C. Surface grinder
D. Tool and cutter grinder
Answer : C
22. Which of the following statement is correct in regard to centreless grinding?
A. The workpiece is supported throughout its entire length as grinding takes place.
B. It is a continuous process and adopted for production work.
C. It requires no holding device for the work.
D. All of the above
Answer : D
23. The cutting fluid mostly used for machining steel is
A. Water
B. Soluble oil
C. Dry
D. Heavy oils
Answer : B
24. In up milling, the thickness of chip is
A. Minimum at the beginning of the cut and maximum at the end of the cut
B. Maximum at the beginning of the cut and minimum at the end of the cut
C. Uniform throughout the cut
D. None of these
Answer : A
25. Which of the following statement is correct for oblique cutting system?
A. The cutting edge is inclined at an angle less than 90° with the normal to the velocity of the tool.
B. Frequently, more than one cutting edges are in action.
C. The chip flows on the tool face at an angle less than 90° with the normal on the cutting edge.
D. All of the above
Answer : D
26. The depth of cut in drilling is __________ the drill diameter.
A. Equal to
B. One-fourth
C. One-half
D. Double
Answer : C
27. The example of snag grinding is
A. Trimming the surface left by sprues and risers on castings
B. Grinding the parting line left on castings
C. Removing flash on forgings
D. All of these
Answer : D
28. The size of a shaper is given by
A. Stroke length
B. Motor power
C. Mass of machine
D. Rate size
Answer : A
29. If a particular Fe-C alloy contains less than 0.83% carbon, it is called
A. High speed steel
B. Hypo eutectoid steel
C. Hyper eutectoid steel
D. Cast iron
Answer : B
30. Match the items of List-I (Equipment) with the items of List-II (Process) and select the correct answer using the given codes.
List-I (Equipment)List-II (Process)
P. Hot Chamber Machine1. Cleaning
Q. Muller2. Core making
R. Dielectric Baker3. Die casting
S. Sand Blaster4. Annealing
.5. Sand mixing

A. P-2, Q-1, R-4, S-5
B. P-4, Q-2, R-3, S-5
C. P-4, Q-5, R-1, S-2
D. P-3, Q-5, R-2, S-1
Answer : D
31. Glazing in grinding wheels takes place when the
A. Wheel is too hard or wheel revolves at a very high speed
B. Wheel is too soft or wheel revolves at a very slow speed
C. Wheel is too hard and wheel revolves at very slow speed
D. Wheel is too soft and wheel revolves at a very high speed
Answer : A
32. The cutting tool in a milling machine is mounted on
A. Spindle
B. Arbor
C. Column
D. Knee
Answer : B
33. The vector sum of cutting velocity and chip velocity is __________ shear velocity.
A. Equal to
B. Less than
C. More than
D. None of these
Answer : A
34. The cutting speed for counter-boring should be _________ that of drilling operation.
A. Equal to
B. Less than
C. Greater than
D. None of these
Answer : C
35. In electrochemical machining, the gap between the tool and work is kept as
A. 0.1 mm
B. 0.4 mm
C. 0.35
D. 0.75 mm
Answer : D
36. An expendable pattern is used in
A. Slush casting
B. Squeeze casting
C. Centrifugal casting
D. Investment casting
Answer : D
37. Surface grinding is done to produce
A. Tapered surface
B. Flat surface
C. Internal cylindrical holes
D. All of these
Answer : B
38. A mandrel is used to hold
A. An eccentric work
B. A heavy work
C. A thin work
D. None of these
Answer : D
39. For turning small taper on long workpiece, the suitable method is
A. By a form tool
B. By setting over the tail stock
C. By a taper turning attachment
D. By swivelling the compound rest
Answer : B
40. In which of the following machine, the work rotates and the tool is stationary?
A. Vertical boring machine
B. Horizontal boring machine
C. Precision boring machine
D. Jig boring machine
Answer : A
41. The average cutting speed for turning mild steel with a high speed steel tool is
A. 15 to 19 m/min
B. 25 to 31 m/min
C. 60 to 90 m/min
D. 90 to 120 m/min
Answer : B
42. The rake angle required to machine brass by high speed steel tool is
A.
B. 10°
C. 20°
D. 100°
Answer : A
43. The relief or clearance at the cutting edge of a flat drill varies from
A. 3° to 8°
B. 20° to 30°
C. 60° to 90°
D. 90° to 120°
Answer : A
44. The cutting force in up milling __________ per tooth movement of the cutter.
A. Is zero
B. Is maximum
C. Decreases from maximum to zero
D. Increases from zero to maximum
Answer : D
45. In machining metals, chips break due to __________ of work material.
A. Toughness
B. Ductility
C. Elasticity
D. Work hardening
Answer : D
46. The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called
A. Truing
B. Dressing
C. Facing
D. Clearing
Answer : A
47. The abrasive recommended for grinding materials of high tensile strength is
A. Silicon carbide
B. Aluminium oxide
C. Sand stone
D. Diamond
Answer : B
48. Which among the NC operations given below are continuous path operations? Arc Welding (AW), Drilling (D), Laser Cutting of Sheet Metal (LC), Milling (M), Punching in Sheet Metal (P), Spot Welding (SW)
A. AW, LC and M
B. AW, D, LC and M
C. D, LC, P and SW
D. D, LC, and SW
Answer : A
49. In reaming process
A. Metal removal rate is high
B. High surface finish is obtained
C. High form accuracy is obtained
D. High dimensional accuracy is obtained
Answer : C
50. The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called
A. Profile milling
B. Gang milling
C. Saw milling
D. Helical milling
Answer : D

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