Workshop Technology 1000+ MCQ with answer for NMAT

1. 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

2. The punch and die set up is ________ for punching and piercing operation.
A. Same
B. Similar
C. Different
D. None of these
Answer : B

3. For cutting brass, the hacksaw blade should have __________ teeth per 25 mm.
A. 14
B. 24
C. 32
D. 40
Answer : A

4. Spot welding is used for welding
A. Lap joints in plates having 0.025 mm to 1.25 mm thickness
B. Lap joints in plates having thickness above 3 mm
C. Butt joints in plates having 0.025 mm to 1.25 mm thickness
D. Butt joints in plates having thickness above 3 mm
Answer : A

5. 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

6. The chisel used for cutting key ways is
A. Flat chisel
B. Cape chisel
C. Round nose chisel
D. Diamond pointed chisel
Answer : B

7. In TIG arc welding, the welding zone is shielded by an atmosphere of
A. Helium gas
B. Argon gas
C. Either (A) or (B)
D. None of these
Answer : C

8. In a cold chamber die casting machine, only nonferrous alloys with _________ are casted.
A. Low melting temperature
B. High melting temperature
C. Both (A) and (B)
D. None of these
Answer : B

9. In welding magnesium with TIG arc welding, direct current with _________ is used.
A. Straight polarity
B. Reversed polarity
C. Both (A) and (B)
D. None of these
Answer : B

10. The blank diameter used in thread rolling will be
A. Equal to minor diameter of the thread
B. Equal to pitch diameter of the thread
C. A little larger than the minor diameter of the thread
D. A little larger than the pitch diameter of the thread
Answer : C

11. During cold working process
A. Grain structure is distorted
B. Strength and hardness of metal increases
C. Close dimensional tolerance can be maintained
D. All of the above
Answer : D

12. The width of slot cut by a hacksaw blade is _______ the width of the blade.
A. Equal to
B. Less than
C. Greater than
D. None of these
Answer : C

13. The temperature of the inner luminous cone of neutral flame is about
A. 1000°C
B. 1250°C
C. 2100°C
D. 3200°C
Answer : D

14. 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

15. Which of the following welding process uses non-consumable electrodes?
A. TIG welding
B. MIG welding
C. Manual arc welding
D. Submerged arc welding
Answer : A

16. The process of increasing the cross-section of a bar at the expense of its length, is called
A. Drawing down
B. Upsetting
C. Spinning
D. Peening
Answer : B

17. A casting defect which occurs due to improper venting of sand is known as
A. Cold shuts
B. Blow holes
C. Shift
D. Swell
Answer : B

18. Swab 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 the moulding box
Answer : C

19. The operation of cutting a sheet of metal in a straight line along the length, is known as
A. Plunging
B. Notching
C. Slitting
D. Forming
Answer : C

20. The diaphragm moulding 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 packing of sand in the mould
D. Give uniform sand hardness throughout the mould
Answer : D

21. In a bilateral system of tolerance, the tolerance is allowed on
A. One side of the actual size
B. One side of the nominal size
C. Both sides of the actual size
D. Both sides of the nominal size
Answer : D

22. The oxyacetylene gas used in gas welding produce a flame temperature of
A. 1800°C
B. 2100°C
C. 2400°C
D. 3200°C
Answer : D

23. Metal patterns are used for
A. Small castings
B. Large castings
C. Complicated castings
D. Large scale production of castings
Answer : D

24. The surface to be left unmachined is marked on the pattern by
A. Red colour
B. Yellow colour
C. Black colour
D. Blue colour
Answer : C

25. 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

26. 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

27. 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

28. When a pattern is made in three parts, the top part, is known as a
A. Drag
B. Cheek
C. Cope
D. None of these
Answer : C

29. In order to produce uniform packing of sand in the moulds, a __________ is used.
A. Sand slinger
B. Squeezing machine
C. Jolt machine
D. Stripper plate machine
Answer : A

30. To prevent the body of the blade from jamming in the saw cut, the teeth of blade are
A. Strengthened
B. Sharpened
C. Set
D. All of these
Answer : C

31. The draft or taper allowance on casting is generally
A. 1 to 2 mm/m
B. 2 to 5 mm/m
C. 5 to 10 mm/m
D. 10 to 15 mm/m
Answer : A

32. In order to get uniform thickness of the plate by rolling process, one provides
A. Camber on the rolls
B. Offset on the rolls
C. Hardening of the rolls
D. Antifriction bearings
Answer : C

33. Most of the oxyacetylene welding is done with
A. Neutral flame
B. Oxidising flame
C. Carburising flame
D. All of these
Answer : A

34. In arc welding, the temperature of heat produced by the electric arc is of the order of
A. 3000°C to 4000°C
B. 4000°C to 5000°C
C. 5000°C to 6000°C
D. 6000°C to 7000°C
Answer : D

35. The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is
A. Less than 0.1 percent
B. Less than 0.3 percent
C. More than 0.3 percent
D. Anywhere between 0.1 to 1 percent
Answer : C

36. In a _________, both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram.
A. Simple die
B. Progressive die
C. Combination die
D. Compound die
Answer : C

37. Which of the following material can be used for making patterns?
A. Aluminium
B. Wax
C. Lead
D. All of these
Answer : D

38. V-block is used to
A. Check the trueness of flat surfaces
B. Locate centres of round rods
C. Check the surface roughness
D. None of these
Answer : D

39. The advantage of Thermit welding is that
A. All parts of the weld section are molten at the same time
B. Weld cools almost uniformly
C. Results in a minimum problem with internal residual stresses
D. All of the above
Answer : D

40. The parts of circular cross-section which are symmetrical about the axis of rotation are made by
A. Hot forging
B. Hot spinning
C. Hot extrusion
D. Hot drawing
Answer : B

41. The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
A. Shearing
B. Piercing
C. Punching
D. Blanking
Answer : B

42. In spot welding, the spacing between two spot weld should not be less than
A. d
B. 1.5 d
C. 3 d
D. 6 d
Answer : C

43. The increase in hardness due to cold working, is called
A. Age hardening
B. Work hardening
C. Induction hardening
D. Flame hardening
Answer : B

44. Loam sand is a mixture of
A. 30% sand and 70% clay
B. 50% sand and 50% clay
C. 70% sand and 30% clay
D. 90% sand and 10% clay
Answer : B

45. Galvanising is a
A. Zinc diffusion process
B. Process of coating zinc by hot dipping
C. Process used for making thin phosphate coating on steel
D. None of the above
Answer : B

46. The difference between the upper limit and lower limit of a dimension is called
A. Nominal size
B. Basic size
C. Actual size
D. Tolerance
Answer : D

47. 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

48. The operation of cutting of a flat sheet to the desired shape is called
A. Shearing
B. Piercing
C. Punching
D. Blanking
Answer : D

49. The minimum size of a bloom is
A. 5 cm × 5 cm
B. 10 cm × 10 cm
C. 15 cm × 15 cm
D. 20 cm × 20 cm
Answer : C

50. The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)
A. t
B. 1.5 t
C. 3 t
D. 6 t
Answer : A