Workshop Technology MCQ Solved Paper for SSC CGL

1. The brass and bronze are welded by _________ flame.
A. Neutral
B. Oxidising
C. Carburising
D. All of these
Answer : B

2. 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

3. The mode of deformation of the metal during spinning is
A. Bending
B. Stretching
C. Rolling and stretching
D. Bending and stretching
Answer : D

4. 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

5. 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

6. The binder commonly used in making oil sand, is
A. Clay type binder
B. Organic type binder
C. Inorganic type binder
D. Any one of these
Answer : B

7. 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

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

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

10. Rotary swaging
A. Is extensively used for making bolts and rivets
B. Is used for reducing the diameters of round bars and a tube 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 : B

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. 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

13. In a unilateral 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 : B

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

15. 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

16. 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

17. In forehand welding, the angle between the welding rod and the work is kept as
A. 30°-40°
B. 40°-50°
C. 50°-60°
D. 60°-70°
Answer : A

18. 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

19. 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

20. 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

21. 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

22. 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

23. 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

24. 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

25. 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

26. Notching 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 : B

27. 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

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

29. 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

30. The type of file used for a wood work is
A. Single cut file
B. Double cut file
C. Rasp cut file
D. Any one of these
Answer : C

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

32. 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

33. 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

34. The maximum flame temperature occurs
A. At the outer cone
B. At the inner cone
C. Between the outer and inner cone
D. At the torch tip
Answer : B

35. 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

36. 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

37. 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

38. For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately
A. 42 mm
B. 44 mm
C. 46 mm
D. 48 mm
Answer : C

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

40. A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
A. Shift
B. Sand wash
C. Swell
D. Scab
Answer : B

41. The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as
A. Drawing
B. Squeezing
C. Coining
D. Planishing
Answer : A

42. 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

43. 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

44. The consumable electrode is used in
A. Carbon arc welding
B. Submerged arc welding
C. TIG arc welding
D. MIG arc welding
Answer : D

45. The sand used for making cores is
A. Green sand
B. Dry sand
C. Loam sand
D. Oil sand
Answer : D

46. 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

47. 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

48. 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

49. 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

50. Carburising flame is used to weld
A. Steel, cast iron, copper, aluminium etc
B. Brass and bronze
C. Hard surfacing materials such as stellite
D. All of these
Answer : C