XAT - Workshop Technology 1000+ MCQ [Solved] PDF Download

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

2. Thermit welding is often used in
A. Replacing broken gear teeth
B. Repairing broken shears
C. Joining rails, truck frames and locomotive frames etc.
D. All of the above
Answer : D

3. In a _________, the molten metal is poured and allowed to solidify while the mould is revolving.
A. Die casting method
B. Slush casting method
C. Permanent mould casting method
D. Centrifugal casting method
Answer : D

4. 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

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

6. 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

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

8. 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

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

10. 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

11. 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

12. 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

13. The casting method adopted for ornaments and toys of nonferrous alloys, is
A. Permanent mould casting
B. Slush casting
C. Die casting
D. Centrifugal casting
Answer : B

14. A rip saw
A. Is a two man saw
B. Is used for cutting along the grains of wood
C. Has a narrow blade with two wooden handles
D. All of the above
Answer : B

15. In a cold 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. Low temperature and pressure is used
Answer : A

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

17. 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

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

19. 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

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

21. 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

22. 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

23. 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

24. 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

25. The increase in hardness due to cold working, is called
A. Age hardening
B. Work hardening
C. Induction hardening
D. Flame hardening
Answer : B

26. The process extensively used for making bolts and nuts is
A. Hot piercing
B. Extrusion
C. Cold peening
D. Cold heading
Answer : D

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

28. When the dimension is expressed as, then the tolerance is
A. 0.035 mm
B. 0.025 mm
C. 0.01 mm
D. 0.06 mm
Answer : D

29. 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

30. The tolerance produced by shell moulding process of casting is
A. +0.05 mm
B. ±0.2 mm
C. +0.5 mm
D. ±1 mm
Answer : B

31. The machining allowance provided on patterns depends upon
A. Type of casting metal
B. Size and shape of casting
C. Method of casting used
D. All of these
Answer : D

32. The shrinkage allowance for cast iron pattern is
A. 10 mm/m
B. 16 mm/m
C. 20 mm/m
D. 26 mm/m
Answer : A

33. 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

34. 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

35. 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

36. In ________ welding, the weld may be made either from left to right or from right to left.
A. Forehand
B. Backhand
C. Vertical
D. None of these
Answer : C

37. 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

38. The blank diameter used in thread rolling will be
A. Equal to minor diameter of the thread
B. Equal to pitch diameter of the thread
C. A little larger than the minor diameter of the thread
D. A little larger than the pitch diameter of the thread
Answer : C

39. 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

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

41. 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

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

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

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

45. A moving mandrel is used in
A. Wire drawing
B. Tube drawing
C. Metal cutting
D. Forging
Answer : B

46. 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

47. 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

48. 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

49. According to Indian standards, the total numbers of tolerance grades are
A. 8
B. 12
C. 18
D. 20
Answer : C

50. The teeth of hacksaw blade are bent
A. Towards right
B. Towards left
C. Alternately towards right and left and every third or fourth left straight
D. May be bent in any direction
Answer : C