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

1. The cross-section of a chisel is usually
A. Rectangular
B. Square
C. Hexagonal
D. Octagonal
Answer : D

2. 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

3. 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

4. A ring gauge is used to
A. Check the diameter of shafts or studs
B. Test the accuracy of holes
C. Check the clearance between two mating surfaces
D. All of the above
Answer : A

5. 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

6. The cold working of metals is carried out
A. At the recrystallisation temperature
B. Below the recrystallisation temperature
C. Above the recrystallisation temperature
D. At any temperature
Answer : B

7. In a four high rolling mill, there are four rolls out of which
A. One is working roll and three are backing up rolls
B. Two are working rolls and two are backing up rolls
C. Three are working rolls and one is backing up roll
D. All of the four are working rolls
Answer : B

8. 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

9. In spot welding, the spacing between two spot weld should not be less than
A. d
B. 1.5 d
C. 3 d
D. 6 d
Answer : C

10. 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

11. During drawing operation, the states of stress in cup would include
A. Compressive stress in the flange
B. Tensile stress in the wall
C. Both (A) and (B)
D. None of these
Answer : C

12. 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

13. The recrystallisation temperature of steel is
A. 400°C
B. 600°C
C. 800°C
D. None of these
Answer : C

14. 4.Linde welding uses
A. Neutral flame and rightward technique
B. Oxidising flame and leftward technique
C. Neutral flame and leftward technique
D. Carburising flame and rightward technique
Answer : D

15. Cutting and forming operations can be performed in a single operation in a
A. Simple die
B. Progressive die
C. Compound die
D. Combination die
Answer : D

16. 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

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. 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

19. 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

20. For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately
A. 42 mm
B. 44 mm
C. 46 mm
D. 48 mm
Answer : C

21. Acetylene gas is stored in cylinders in
A. Solid form
B. Gaseous form
C. Liquid form
D. Any one of these
Answer : C

22. For gas welding, the pressure desired at the welding torch for oxygen 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 : B

23. 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

24. A casting defect which results in general enlargement of a casting is known as
A. Shift
B. Sand wash
C. Swell
D. Scab
Answer : C

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

26. 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

27. A gimlet is a ________ tool.
A. Boring
B. Marking
C. Cutting
D. None of these
Answer : A

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

29. 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

30. 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

31. The type of file used for a wood work is
A. Single cut file
B. Double cut file
C. Rasp cut file
D. Any one of these
Answer : C

32. 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

33. The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as
A. Hot piercing
B. Extrusion
C. Cold peening
D. Cold heading
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. Cold working of metal increases
A. Tensile strength
B. Yield strength
C. Hardness
D. All of these
Answer : D

36. 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

37. A basic hole 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 : A

38. 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

39. 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

40. 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

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

42. 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

43. 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

44. 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

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

46. 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

47. 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

48. 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

49. 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

50. 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