Mechanical Engineering Workshop MCQ - Set 10

Practice Test: Question Set - 10

1. The temperature produced by oxy-hydrogen flame is about
    (A) 1800°C
    (B) 2100°C
    (C) 2400°C
    (D) 3200°C

2. The shrinkage allowance for cast iron pattern is
    (A) 10 mm/m
    (B) 16 mm/m
    (C) 20 mm/m
    (D) 26 mm/m

3. 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

4. In order to get uniform thickness of the plate by rolling process, one provides
    (A) Camber on the rolls
    (B) Offset on the rolls
    (C) Hardening of the rolls
    (D) Antifriction bearings

5. Cold working of metal increases
    (A) Tensile strength
    (B) Yield strength
    (C) Hardness
    (D) All of these

6. A casting defect which results in general enlargement of a casting is known as
    (A) Shift
    (B) Sand wash
    (C) Swell
    (D) Scab

7. A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
    (A) Shift
    (B) Sand wash
    (C) Swell
    (D) Scab

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

9. The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
    (A) Shearing
    (B) Piercing
    (C) Punching
    (D) Blanking

10. 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

11. Thread rolling is restricted to
    (A) Ferrous materials
    (B) Ductile materials
    (C) Hard materials
    (D) None of these

12. 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

13. 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

14. 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°

15. 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

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