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

1. 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

2. 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

3. 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

4. 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

5. Neutral flame is used to weld
A. Steel
B. Cast iron
C. Copper
D. All of these
Answer : D

6. For welding plates of thickness less than 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 : A

7. 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

8. 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

9. The oxygen cylinder is usually painted with
A. Black colour
B. White colour
C. Maroon colour
D. Yellow colour
Answer : A

10. 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

11. 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

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

13. 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

14. 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

15. 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

16. 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

17. A jolt 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 sand hardness throughout the mould
D. Produce uniform packing of sand in the mould
Answer : A

18. When the file is moved to and fro over the work, it is known as
A. Cross filing
B. Draw filing
C. Pull and push filing
D. None of these
Answer : B

19. 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

20. The draft or taper allowance on casting is generally
A. 1 to 2 mm/m
B. 2 to 5 mm/m
C. 5 to 10 mm/m
D. 10 to 15 mm/m
Answer : A

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

22. 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

23. 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

24. 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

25. Which one of the following material will require the largest size of riser for the same size of casting?
A. Aluminium
B. Cast iron
C. Steel
D. Copper
Answer : C

26. 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

27. 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

28. 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

29. 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

30. The operation of bending a sheet of metal along a curved axis, is known as
A. Plunging
B. Notching
C. Slitting
D. Forming
Answer : D

31. 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

32. 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

33. 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

34. 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

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

36. 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

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

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

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

41. When the dimension is expressed as 20 -0.025 ????³?, then the basic size is
A. 20 mm
B. 20.035 mm
C. 20.025 mm
D. 19.975 mm
Answer : A

42. 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

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

44. 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

45. In submerged arc welding, an arc is produced between a
A. Carbon electrode and the work
B. Metal electrode and the work
C. Bare metal electrode and the work
D. Two tungsten electrodes and the work
Answer : C

46. 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

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

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

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