1000+ Workshop Technology Multiple Choice Question Answer [Solved]

1. The temperature of the inner luminous cone of neutral flame is about
A. 1000°C
B. 1250°C
C. 2100°C
D. 3200°C
Answer : D

2. A file removes the metal during
A. Forward stroke
B. Return stroke
C. Both forward and return strokes
D. None of these
Answer : A

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

4. Which of the following statement is wrong?
A. The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.
B. The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.
C. The castings produced by centrifugal casting method have open and coarse grained structure.
D. All of the above
Answer : C

5. 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

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

7. Cores are used to
A. Form internal cavities in the casting
B. Improve mould surface
C. Form a part of a green sand mould
D. All of these
Answer : D

8. 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

9. 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

10. 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

11. 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

12. 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

13. In blanking 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 : A

14. 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

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

16. A two high rolling mill consists of two rolls which rotate
A. At the same speed and in the same direction
B. At the same speed but in opposite direction
C. At different speeds and in the same direction
D. At different speeds and in the opposite direction
Answer : B

17. 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

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

20. 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

21. The welding process used to join the ends of two pipes of uniform cross-section, is
A. Spot welding
B. Seam welding
C. Projection welding
D. Upset butt welding
Answer : D

22. 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

23. The centrifugal casting method, is used for casting articles of
A. Symmetrical shape about vertical axis
B. Symmetrical shape about horizontal axis
C. Irregular shape
D. Nonferrous metal only
Answer : B

24. V-block is used to
A. Check the trueness of flat surfaces
B. Locate centres of round rods
C. Check the surface roughness
D. None of these
Answer : D

25. The directional solidification in casting can be improved by using
A. Chills and chaplets
B. Chills and padding
C. Chaplets and padding
D. Chills, chaplets and padding
Answer : B

26. 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

27. 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

28. 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

29. 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

30. In sheet metal blanking, shear is provided on punches and dies so that
A. Press load is reduced
B. Good cut edge is obtained
C. Warping of sheet is minimised
D. Cut blanks is straight
Answer : A

31. 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

32. 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

33. 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

34. 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

35. 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

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

37. 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

38. In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.
A. Sand slinger
B. Squeezing machine
C. Jolt machine
D. Stripper plate machine
Answer : B

39. 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

40. 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

41. 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

42. 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

43. 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

44. 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

45. 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

46. 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

47. 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

48. 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

49. 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

50. 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