Workshop Technology 1000+ MCQ with answer for SBI PO

1. 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

2. The algebraic difference between the minimum limit and the basic size is called
A. Actual deviation
B. Upper deviation
C. Lower deviation
D. Fundamental deviation
Answer : C

3. 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

4. In welding magnesium with TIG arc welding, direct current with _________ is used.
A. Straight polarity
B. Reversed polarity
C. Both (A) and (B)
D. None of these
Answer : B

5. The welding process used in joining mild steel shanks to high speed drills, is
A. Spot welding
B. Seam welding
C. Flash butt welding
D. Upset butt welding
Answer : C

6. 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

7. Green 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 : C

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

9. Seam 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 : A

10. 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

11. Aluminium is the best material for making patterns because it is
A. Light in weight
B. Easy to work
C. Corrosion resistant
D. All of these
Answer : D

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

13. 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

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

15. When a pattern is made in three parts, the top part, is known as a
A. Drag
B. Cheek
C. Cope
D. None of these
Answer : C

16. 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

17. When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by
A. Washing it with water
B. Rubbing on wood
C. Washing it with dilute acid
D. Using file card
Answer : D

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

19. 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

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

21. Lap joints are employed on plates having thickness
A. Less than 3 mm
B. 5 to 10 mm
C. 12.5 mm
D. Above 25 mm
Answer : A

22. 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

23. 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

24. 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

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

26. 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

27. The advantage of Thermit welding is that
A. All parts of the weld section are molten at the same time
B. Weld cools almost uniformly
C. Results in a minimum problem with internal residual stresses
D. All of the above
Answer : D

28. The upsetting is a process of
A. Increasing the cross-section of a bar
B. Reducing the cross-section of a bar
C. Joining the two surfaces of metal under pressure after heating
D. Bending of a bar
Answer : A

29. 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

30. The sand used for making cores is
A. Green sand
B. Dry sand
C. Loam sand
D. Oil sand
Answer : D

31. 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

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

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

34. 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

35. 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

36. The binder commonly used in making oil sand, is
A. Clay type binder
B. Organic type binder
C. Inorganic type binder
D. Any one of these
Answer : B

37. 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

38. In arc welding, the temperature of heat produced by the electric arc is of the order of
A. 3000°C to 4000°C
B. 4000°C to 5000°C
C. 5000°C to 6000°C
D. 6000°C to 7000°C
Answer : D

39. 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

40. The accuracy of micrometers, calipers, dial indicators can be checked by a
A. Feeler gauge
B. Slip gauge
C. Ring gauge
D. Plug gauge
Answer : B

41. The oxyacetylene gas used in gas welding produce a flame temperature of
A. 1800°C
B. 2100°C
C. 2400°C
D. 3200°C
Answer : D

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

43. 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

44. 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

45. 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

46. 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

47. 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

48. 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

49. The process of increasing the cross-section of a bar at the expense of its length, is called
A. Drawing down
B. Upsetting
C. Spinning
D. Peening
Answer : B

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