1000+ Workshop Technology Multiple Choice Question Answer [Solved]

1. 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

2. Blanking and piercing operations can be performed simultaneously in a
A. Simple die
B. Progressive die
C. Compound die
D. Combination die
Answer : C

3. 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

4. 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

5. 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

6. 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

7. 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

8. In a compound die
A. Only one operation is performed at each stroke of the ram
B. Two or more operations are performed simultaneously at the single stroke of the ram
C. Two or more cutting operations are performed at one station of the press in every stroke of the ram
D. Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
Answer : C

9. Extrusion
A. Is extensively used for making bolts and nuts
B. Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work
C. Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
D. Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part
Answer : D

10. In a centrifugal casting method
A. Core is made of sand
B. Core is made of ferrous metal
C. Core is made of nonferrous metal
D. No core is used
Answer : D

11. 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

12. Lancing is the operation of
A. Cutting a sheet of metal in a straight line along the length
B. Removal of metal to the desired shape from the edge of a plate
C. Cutting a sheet of metal through part of its length and then bending the cut portion
D. Bending a sheet of metal along a curved axis
Answer : C

13. In order to check the clearance between two mating surfaces, a ________ gauge should be used.
A. Ring
B. Plug
C. Feeler
D. None of these
Answer : C

14. An oxidising process used for aluminium and magnesium articles is called
A. Galvanising
B. Anodising
C. Parkerising
D. Sherardizing
Answer : B

15. Sand wash 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 the 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 : C

16. A hacksaw blade is specified by its
A. Length
B. Material
C. Width
D. Number of teeth
Answer : A

17. The recrystallisation temperature of steel is
A. 400°C
B. 600°C
C. 800°C
D. None of these
Answer : C

18. 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

19. 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

20. The flux commonly used in brazing is
A. Zinc chloride
B. Ammonium chloride
C. Rosin plus alcohol
D. Borax
Answer : D

21. In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls.
A. Equal to
B. Smaller than
C. Larger than
D. None of these
Answer : C

22. A mortise gauge is a
A. Striking tool
B. Planing tool
C. Boring tool
D. Marking tool
Answer : D

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

24. The instrument used to measure external and internal diameter of shafts, thickness of parts and depth of holes, is
A. Outside micrometer
B. Inside micrometer
C. Depth gauge micrometer
D. Vernier caliper
Answer : D

25. When more volume of acetylene and less volume of oxygen is supplied, then a ________ flame is obtained.
A. Neutral
B. Oxidising
C. Carburising
D. None of these
Answer : C

26. A taper provided on the pattern for its easy and clean withdrawal from the mould is known as
A. Machining allowance
B. Draft allowance
C. Shrinkage allowance
D. Distortion allowance
Answer : B

27. 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

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

29. 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

30. The algebraic difference between the maximum limit and the basic size is called
A. Actual deviation
B. Upper deviation
C. Lower deviation
D. Fundamental deviation
Answer : B

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

32. The dowels are
A. Wooden nails
B. Box nails
C. Wire nails
D. None of these
Answer : A

33. According to Indian standard specifications, 100 H6/g 5 means that.
A. Basic size is 100 mm
B. Actual size is 100 mm
C. Difference between the actual size and basic size is 100 mm
D. None of the above
Answer : A

34. 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

35. 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

36. 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

37. The temperature at which the new grains are formed in the metal is called
A. Lower critical temperature
B. Upper critical temperature
C. Eutectic temperature
D. Recrystallisation temperature
Answer : D

38. 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

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

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. 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

42. Which of the following statement is wrong?
A. The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.
B. The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.
C. The castings produced by centrifugal casting method have open and coarse grained structure.
D. All of the above
Answer : C

43. 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

44. In electric resistance welding, voltage required for heating is
A. 1 to 5 volts
B. 6 to 10 volts
C. 11 to 20 volts
D. 50 to 100 volts
Answer : B

45. 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

46. 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

47. The purpose of a riser is to
A. Deliver 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. Deliver the molten metal from pouring basin to gate
Answer : C

48. 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

49. 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

50. A progressive limit gauge has
A. 'Go' and 'Not go' member on the same side of the gauge
B. Separate 'Go' and 'Not go' members
C. 'Go' member at one end and 'Not go' member at the other end
D. None of the above
Answer : A