SSC MTS - Workshop Technology 1000+ MCQ [Solved] PDF Download

1. In welding copper alloys with TIG arc welding
A. Direct current with straight polarity is used
B. Direct current with reversed polarity is used
C. Alternating current is used
D. Any one of these
Answer : A

2. The property of sand due to which the sand grains stick together is called
A. Collapsibility
B. Permeability
C. Cohesiveness
D. Adhesiveness
Answer : C

3. 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

4. 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

5. In die casting, machining allowance is
A. Small
B. Large
C. Very large
D. Not provided
Answer : D

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

7. For gas welding, the pressure desired at the welding torch for acetylene 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 : A

8. The cold chisels are made by
A. Drawing
B. Rolling
C. Piercing
D. Forging
Answer : D

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

10. 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

11. 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

12. 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

13. 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

14. For welding plates of thickness more than 12.5 mm, its edges
A. Do not require bevelling
B. Should be bevelled to a single-V or U-groove
C. Should have a double-V or U-groove on one side
D. Should have a double-V or U-groove on both sides
Answer : D

15. 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

16. 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

17. 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

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

19. A basic hole 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 : A

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

21. 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

22. In forehand welding, the weld is made
A. From left to right
B. From right to left
C. First from left to right and then from right to left
D. Either from left to right or from right to left
Answer : B

23. 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

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

25. Cast iron and steel pipes are produced by
A. Slush casting
B. Investment casting
C. True centrifugal casting
D. Die casting
Answer : C

26. 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

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

28. 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

29. 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

30. 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

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 cross-section of a chisel is usually
A. Rectangular
B. Square
C. Hexagonal
D. Octagonal
Answer : D

33. Seam welding is best adopted for metal thickness ranging from
A. 0.025 to 3 mm
B. 3 to 5 mm
C. 5 to 8 mm
D. 8 to 10 mm
Answer : A

34. The cold 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 : B

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

36. 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

37. 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

38. The adhesiveness is the property of sand due to which
A. It evolves a great amount of steam and other gases
B. The sand grains stick together
C. It clings to the sides of a moulding box
D. None of these
Answer : C

39. In sheet metal work, he cutting force on the tool can be reduced by
A. Grinding the cutting edges sharp
B. Increasing the hardness of tool
C. Providing shear on tool
D. Increasing the hardness of die
Answer : A

40. In shielded arc welding
A. Large electrode is used
B. Welding rod coated with slag is used
C. Welding rod coated with fluxing material is used
D. None of the above
Answer : C

41. 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

42. 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

43. 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

44. 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

45. A sand employed on the faces of the pattern before moulding, is called
A. Green sand
B. Dry sand
C. Loam sand
D. Parting sand
Answer : D

46. 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

47. 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

48. A diamond pointed chisel is used for cutting
A. Flat surfaces
B. Grooves
C. Keyways
D. V-shaped grooves
Answer : D

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. 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