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CAT - Workshop Technology 1000+ MCQ [Solved] PDF Download

Thursday 9th of March 2023

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1. During drawing operation, the states of stress in cup would include
A. Compressive stress in the flange
B. Tensile stress in the wall
C. Both (A) and (B)
D. None of these
Answer : C
2. The welding process used to join the ends of two pipes of uniform cross-section, is
A. Spot welding
B. Seam welding
C. Projection welding
D. Upset butt welding
Answer : D
3. The increase in hardness due to cold working, is called
A. Age hardening
B. Work hardening
C. Induction hardening
D. Flame hardening
Answer : B
4. In sheet metal blanking, shear is provided on punches and dies so that
A. Press load is reduced
B. Good cut edge is obtained
C. Warping of sheet is minimised
D. Cut blanks is straight
Answer : A
5. In die casting, machining allowance is
A. Small
B. Large
C. Very large
D. Not provided
Answer : D
6. A basic shaft is one whose
A. Lower deviation is zero
B. Upper deviation is zero
C. Lower and upper deviations are zero
D. None of these
Answer : B
7. Which of the following statement is wrong?
A. The angular clearance on dies varies from 0.5° to 1°
B. In drawing operation, the metal flows due to plasticity
C. In press operation, the size of the pierced hole is independent of the size of punch
D. None of the above
Answer : D
8. Shift is a casting defect which
A. Results in a mismatching of the top and bottom parts of a casting
B. Results in general enlargement of a casting
C. Occurs near the ingates as rough lumps on the surface of a casting
D. Occurs as sand patches on the upper surface of a casting
Answer : A
9. In piercing operation, the clearance is provided on
A. Punch
B. Die
C. Half on the punch and half on the die
D. Either on punch or die depending upon designer's choice
Answer : B
10. In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
A. Same
B. Less
C. More
D. None of these
Answer : C
11. The teeth of hacksaw blade are bent
A. Towards right
B. Towards left
C. Alternately towards right and left and every third or fourth left straight
D. May be bent in any direction
Answer : C
12. A casting defect which results in general enlargement of a casting is known as
A. Shift
B. Sand wash
C. Swell
D. Scab
Answer : C
13. Tandem drawing of wires and tubes is necessary because
A. It is not possible to reduce at one stage
B. Annealing is needed between stages
C. Accuracy in dimensions is not possible otherwise
D. Surface finish improves after every drawing stage
Answer : B
14. Thread rolling is restricted to
A. Ferrous materials
B. Ductile materials
C. Hard materials
D. None of these
Answer : B
15. A file removes the metal during
A. Forward stroke
B. Return stroke
C. Both forward and return strokes
D. None of these
Answer : A
16. In order to deliver molten metal from pouring basin to gate, a ________ is used.
A. Riser
B. Sprue
C. Core
D. None of these
Answer : B
17. A hacksaw blade cuts on the
A. Forward stroke
B. Return stroke
C. Both forward and return strokes
D. Cutting depends upon the direction of force
Answer : A
18. When a pattern is made in three parts, the ________ is known as a drag.
A. Bottom part
B. Middle part
C. Top part
D. None of these
Answer : A
19. Aluminium is the best material for making patterns because it is
A. Light in weight
B. Easy to work
C. Corrosion resistant
D. All of these
Answer : D
20. A moving mandrel is used in
A. Wire drawing
B. Tube drawing
C. Metal cutting
D. Forging
Answer : B
21. The upsetting is a process of
A. Increasing the cross-section of a bar
B. Reducing the cross-section of a bar
C. Joining the two surfaces of metal under pressure after heating
D. Bending of a bar
Answer : A
22. The operation of straightening a curved sheet metal, is known as
A. Drawing
B. Squeezing
C. Coining
D. Planishing
Answer : D
23. Which one of the following material will require the largest size of riser for the same size of casting?
A. Aluminium
B. Cast iron
C. Steel
D. Copper
Answer : C
24. The welding process used in joining mild steel shanks to high speed drills, is
A. Spot welding
B. Seam welding
C. Flash butt welding
D. Upset butt welding
Answer : C
25. The fullers are used
A. For finishing flat surfaces
B. For necking down a piece of work
C. For punching a hole
D. To finish the punched hole
Answer : B
26. The metal extrusion process is generally used for producing
A. Uniform solid sections
B. Uniform hollow sections
C. Uniform solid and hollow sections
D. Varying solid and hollow sections
Answer : C
27. Cores are used to
A. Form internal cavities in the casting
B. Improve mould surface
C. Form a part of a green sand mould
D. All of these
Answer : D
28. A jolt machine is used to
A. Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
B. Ram the sand harder at the back of the mould and softer on the pattern face
C. Produce uniform sand hardness throughout the mould
D. Produce uniform packing of sand in the mould
Answer : A
29. The punch and die set up is ________ for punching and piercing operation.
A. Same
B. Similar
C. Different
D. None of these
Answer : B
30. A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?
A. The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction
B. The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction
C. The bottom and middle roll rotate in the same direction
D. Any one of the above
Answer : B
31. A mortise gauge is a
A. Striking tool
B. Planing tool
C. Boring tool
D. Marking tool
Answer : D
32. The temperature of oxy-hydrogen flame is _________ oxyacetylene flame.
A. Same as
B. Less than
C. More than
D. None of these
Answer : B
33. Structural sections such as rails, angles, I-beams are made by
A. Hot rolling
B. Hot drawing
C. Hot piercing
D. Hot extrusion
Answer : A
34. During hot working of metals
A. Porosity of the metal is largely eliminated
B. Grain structure of the metal is refined
C. Mechanical properties are improved due to refinement of grains
D. All of the above
Answer : D
35. The hot working of metals is carried out
A. At the recrystallisation temperature
B. Below the recrystallisation temperature
C. Above the recrystallisation temperature
D. At any temperature
Answer : C
36. The operation of cutting of a flat sheet to the desired shape is called
A. Shearing
B. Piercing
C. Punching
D. Blanking
Answer : D
37. In backhand welding, the angle between the welding torch and the work is kept as
A. 30°-40°
B. 40°-50°
C. 50°-60°
D. 60°-70°
Answer : B
38. The purpose of a gate is to
A. Delivers molten metal into the mould cavity
B. Act as a reservoir for the molten metal
C. Feed the molten metal to the casting in order to compensate for the shrinkage
D. Delivers molten metal from pouring basin to gate
Answer : A
39. The current in electric resistance welding can be regulated by
A. Varying the input supply
B. Changing the primary turns of the transformer
C. Changing the secondary turns of the transformer
D. Any one of the above
Answer : B
40. In a _________, the molten metal is poured and allowed to solidify while the mould is revolving.
A. Die casting method
B. Slush casting method
C. Permanent mould casting method
D. Centrifugal casting method
Answer : D
41. In submerged arc welding, an arc is produced between a
A. Carbon electrode and the work
B. Metal electrode and the work
C. Bare metal electrode and the work
D. Two tungsten electrodes and the work
Answer : C
42. A file with 20 teeth in 25 mm is called
A. Rough file
B. Bastard file
C. Second cut file
D. Smooth file
Answer : A
43. When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used.
A. Horizontal core
B. Vertical core
C. Drop core
D. Balanced core
Answer : C
44. For cutting brass, the hacksaw blade should have __________ teeth per 25 mm.
A. 14
B. 24
C. 32
D. 40
Answer : A
45. Riddle is used for
A. Smoothing and cleaning out depressions in the mould
B. Cleaning the moulding sand
C. Moistening the sand around the edge before removing pattern
D. Reinforcement of sand in the top part of moulding box
Answer : B
46. The machining allowance provided on patterns depends upon
A. Type of casting metal
B. Size and shape of casting
C. Method of casting used
D. All of these
Answer : D
47. When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as
A. Die casting method
B. Slush casting method
C. Permanent mould casting method
D. Centrifugal casting method
Answer : C
48. Which of the following welding method uses a pool of molten metal?
A. Carbon arc welding
B. Submerged arc welding
C. TIG arc welding
D. MIG arc welding
Answer : B
49. An oxidising process used for aluminium and magnesium articles is called
A. Galvanising
B. Anodising
C. Parkerising
D. Sherardizing
Answer : B
50. Which of the following statement is wrong?
A. The mortise gauge has two scribing pins
B. The gouges are chisels with a hollow shaped blade
C. An auger is a planing tool
D. All of these
Answer : C

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