1000+ Workshop Technology Multiple Choice Question Answer [Solved]

1. 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

2. 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

3. The welding set up is said to have straight polarity, when
A. Work is connected to the positive terminal and the electrode holder to the negative terminal
B. Work is connected to the negative terminal and the electrode holder to the positive terminal
C. Work is connected to the positive terminal and the electrode holder is earthed
D. Work is connected to the negative terminal and the electrode holder is earthed
Answer : A

4. Thread rolling is restricted to
A. Ferrous materials
B. Ductile materials
C. Hard materials
D. None of these
Answer : B

5. In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.
A. Sand slinger
B. Squeezing machine
C. Jolt machine
D. Stripper plate machine
Answer : B

6. The metal is subjected to mechanical working for
A. Refining grain size
B. Reducing original block into desired shape
C. Controlling the direction of flow lines
D. All of these
Answer : D

7. When the file is moved to and fro over the work, it is known as
A. Cross filing
B. Draw filing
C. Pull and push filing
D. None of these
Answer : B

8. In permanent mould casting method
A. Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
B. Molten metal is poured and allowed to solidify while the mould is revolving
C. Molten metal is forced into mould under high pressure
D. None of the above
Answer : D

9. The instrument which has all the features of try-square, bevel protractor, rule and scriber, is
A. Outside micrometer
B. Inside micrometer
C. Depth gauge micrometer
D. Combination set
Answer : D

10. The metal patterns as compared to wooden patterns require less
A. Shrinkage allowance
B. Machining allowance
C. Draft allowance
D. Distortion allowance
Answer : C

11. 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

12. Cold working of metal increases
A. Tensile strength
B. Yield strength
C. Hardness
D. All of these
Answer : D

13. Lap joints are employed on plates having thickness
A. Less than 3 mm
B. 5 to 10 mm
C. 12.5 mm
D. Above 25 mm
Answer : A

14. 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

15. The oxygen cylinder is usually painted with
A. Black colour
B. White colour
C. Maroon colour
D. Yellow colour
Answer : A

16. In a hot chamber die casting machine
A. Melting pot is separate from the machine
B. Melting pot is an integral part of the machine
C. Melting pot may have any location
D. High temperature and pressure is used
Answer : B

17. In electric resistance welding, pressure applied varies from
A. 1 to 5 MPa
B. 5 to 10 MPa
C. 10 to 25 MPa
D. 25 to 55 MPa
Answer : D

18. 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

19. 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

20. The electrodes used in spot welding have a tip of
A. Stainless steel
B. Aluminium
C. Copper
D. Brass
Answer : C

21. A file removes the metal during
A. Forward stroke
B. Return stroke
C. Both forward and return strokes
D. None of these
Answer : A

22. 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

23. For gas welding, the pressure desired at the welding torch for oxygen is
A. 7 to 103 kN/m²
B. 70 to 280 kN/m²
C. 280 to 560 kN/m²
D. 560 to 840 kN/m²
Answer : B

24. The operation of straightening a curved sheet metal, is known as
A. Drawing
B. Squeezing
C. Coining
D. Planishing
Answer : D

25. 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

26. A gimlet is a ________ tool.
A. Boring
B. Marking
C. Cutting
D. None of these
Answer : A

27. The cold chisels are made from
A. Cast iron
B. Mild steel
C. High speed steel
D. Cast tool steel
Answer : D

28. 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

29. The property of sand due to which it evolves a great amount of steam and other gases is called
A. Collapsibility
B. Permeability
C. Cohesiveness
D. Adhesiveness
Answer : B

30. 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

31. The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as
A. Hot piercing
B. Extrusion
C. Cold peening
D. Cold heading
Answer : C

32. The operation of bending a sheet of metal along a curved axis, is known as
A. Plunging
B. Notching
C. Slitting
D. Forming
Answer : D

33. Scribing block is used to
A. Hold the round bars during marking
B. Check the trueness of flat surfaces
C. Locate the centres of round bars
D. Check the surface roughness
Answer : C

34. When the dimension is expressed as 20 -0.025 ????³?, then the basic size is
A. 20 mm
B. 20.035 mm
C. 20.025 mm
D. 19.975 mm
Answer : A

35. The centrifugal casting method, is used for casting articles of
A. Symmetrical shape about vertical axis
B. Symmetrical shape about horizontal axis
C. Irregular shape
D. Nonferrous metal only
Answer : B

36. 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

37. A zinc diffusion process is called
A. Galvanising
B. Anodising
C. Parkerising
D. Sherardizing
Answer : D

38. A two high rolling mill consists of two rolls which rotate
A. At the same speed and in the same direction
B. At the same speed but in opposite direction
C. At different speeds and in the same direction
D. At different speeds and in the opposite direction
Answer : B

39. 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

40. The most preferred process for casting gas turbine blades is
A. Die casting
B. Shell moulding
C. Investment moulding
D. Sand casting
Answer : B

41. 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

42. Piercing is an operation of cutting
A. A cylindrical hole in a sheet of metal by the punch and the die
B. A hole (other than cylindrical) in a sheet of metal by the punch and the die
C. A flat sheet to the desired shape
D. A number of holes evenly spaced in a regular pattern on a sheet of metal
Answer : B

43. During hot working of metals
A. Poor surface finish is produced
B. Scale is formed on the metal surface
C. Close tolerances cannot be maintained
D. All of these
Answer : D

44. The material which can be best cut with oxygen cutting process is
A. Mild steel
B. Brass
C. Copper
D. Aluminium
Answer : A

45. The electron beam welding can be carried out in
A. Open air
B. A shielded gas environment
C. Vacuum
D. A pressurised inert gas chamber
Answer : C

46. 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

47. Projection welding is a
A. Continuous spot welding process
B. Multi-spot welding process
C. Arc welding process
D. Process used for joining round bars
Answer : B

48. 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

49. 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

50. If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be
A. 10 mm/m
B. 16 mm/m
C. 20 mm/m
D. 26 mm/m
Answer : D