RRB Group D - Workshop Technology 1000+ MCQ [Solved] PDF Download

1. 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

2. 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

3. 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

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

5. 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

6. 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

7. The temperature of oxy-hydrogen flame is _________ oxyacetylene flame.
A. Same as
B. Less than
C. More than
D. None of these
Answer : B

8. 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

9. A pattern maker's shrinkage rule considers
A. All pattern allowances
B. Only shrinkage allowance
C. All materials to be cast
D. All materials of the pattern
Answer : B

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

11. The temperature produced by oxy-hydrogen flame is about
A. 1800°C
B. 2100°C
C. 2400°C
D. 3200°C
Answer : C

12. For smoothing and cleaning out depressions in the mould, a __________ is used.
A. Slick
B. Lifter
C. Swab
D. Gagger
Answer : B

13. In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.
A. Same
B. Less
C. More
D. None of these
Answer : A

14. 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

15. 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

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

17. The cutting edge of a chisel should be
A. Hardened
B. Tempered
C. Hardened and tempered
D. Case hardened
Answer : C

18. 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

19. In arc welding, the electric arc is produced between the work and the electrode by
A. Voltage
B. Flow of current
C. Contact resistance
D. All of these
Answer : C

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

21. 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

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

23. 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

24. The current in electric resistance welding can be regulated by
A. Varying the input supply
B. Changing the primary turns of the transformer
C. Changing the secondary turns of the transformer
D. Any one of the above
Answer : B

25. 4.Linde welding uses
A. Neutral flame and rightward technique
B. Oxidising flame and leftward technique
C. Neutral flame and leftward technique
D. Carburising flame and rightward technique
Answer : D

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

27. In a simple die
A. Two or more operations are performed simultaneously at the single stroke of the ram
B. Two or more cutting operations are performed at one station of the press in every stroke of the ram
C. Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
D. None of the above
Answer : D

28. 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

29. The purpose of a gate is to
A. Delivers 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. Delivers molten metal from pouring basin to gate
Answer : A

30. For arc welding
A. Alternating current with high frequency is used
B. Alternating current with low frequency is used
C. Direct current is used
D. Any one of these
Answer : C

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

32. 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

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

34. 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

35. When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used.
A. Horizontal core
B. Vertical core
C. Drop core
D. Balanced core
Answer : C

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

37. In average work, the tolerance produced by investment casting method is
A. ±0.05 mm
B. +0.2 mm
C. +05 mm
D. +1 mm
Answer : A

38. 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

39. 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

40. Which of the following methods can be used for manufacturing 2 metre long seamless metallic tubes?
A. Drawing
B. Extrusion
C. Rolling
D. Extrusion and rolling
Answer : D

41. Structural sections such as rails, angles, I-beams are made by
A. Hot rolling
B. Hot drawing
C. Hot piercing
D. Hot extrusion
Answer : A

42. 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

43. 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

44. 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

45. 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

46. Acetylene gas is stored in cylinders in
A. Solid form
B. Gaseous form
C. Liquid form
D. Any one of these
Answer : C

47. 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

48. 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

49. 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

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