SSC GD - Workshop Technology 1000+ MCQ [Solved] PDF Download

1. 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

2. A basic shaft is one whose
A. Lower deviation is zero
B. Upper deviation is zero
C. Lower and upper deviations are zero
D. None of these
Answer : B

3. 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

4. In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is
A. 5 litres
B. 10 litres
C. 15 litres
D. 20 litres
Answer : B

5. The brass and bronze are welded by _________ flame.
A. Neutral
B. Oxidising
C. Carburising
D. All of these
Answer : B

6. 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

7. 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

8. 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

9. 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

10. A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?
A. The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction
B. The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction
C. The bottom and middle roll rotate in the same direction
D. Any one of the above
Answer : B

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. 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

18. The most preferred process for casting gas turbine blades is
A. Die casting
B. Shell moulding
C. Investment moulding
D. Sand casting
Answer : B

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

20. 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

21. 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

22. 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

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

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

25. In a hot chamber die casting machine
A. Ferrous alloys with low melting temperature are casted
B. Ferrous alloys with high melting temperature are casted
C. Nonferrous alloys with low melting temperature are casted
D. Nonferrous alloys with high melting temperature are casted
Answer : C

26. 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

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

28. Spot welding is used for welding
A. Lap joints in plates having 0.025 mm to 1.25 mm thickness
B. Lap joints in plates having thickness above 3 mm
C. Butt joints in plates having 0.025 mm to 1.25 mm thickness
D. Butt joints in plates having thickness above 3 mm
Answer : A

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

30. 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

31. 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

32. 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

33. 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

34. 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

35. A hacksaw blade cuts on the
A. Forward stroke
B. Return stroke
C. Both forward and return strokes
D. Cutting depends upon the direction of force
Answer : A

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

37. 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

38. 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

39. 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

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. In a bilateral 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 : D

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

43. 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

44. 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

45. 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

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

47. 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

48. 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

49. 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

50. 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