Mechanical Engineering Quiz - Set 05


1. In mechanical refrigeration system, the refrigerant occurs as liquid between condenser and expansion valve.
True
False

2. In a four stroke cycle petrol engine, the charge is compressed when both the valves (i.e. inlet valve and exit valve) are closed.
Agree
Disagree

3. PERT is an event oriented technique.
Correct
Incorrect

4. The efficiency of a centrifugal pump will be maximum when the blades are bent backward.
Yes
No

5. The water, alcohol and ammonia have same refrigerating effect at different altitudes.
Yes
No

6. In nuclear power plants, due to reflector, less fuel is needed to generate sufficient neutrons to sustain a chain reaction.
Yes
No

7. According to Gay-Lussac law, the absolute pressure of a given mass of a perfect gas varies _________ as its absolute temperature, when the volume remains constant.
Directly
Indirectly

8. Light weight substances cannot be effective moderators.
True
False

9. The discharge of a centrifugal pump working under constant head ________ with the speed.
Increases
Decreases

10. The angle included between the two lips projected upon a plane parallel to the drill axis and parallel to the two cutting lips, is called helix angle.
Correct
Incorrect

11. The velocity of tool relative to the workpiece is known as cutting velocity.
True
False

12. In case of solids, the heat transfer takes place according to radiation.
Correct
Incorrect

13. In a centrifugal compressor, the air enters the impeller axially and leaves the vane radially.
Yes
No

14. A plug gauge is used to check the diameter of shafts and studs.
Correct
Incorrect

15. When the gas is heated at constant volume, the heat supplied increases the internal energy of the gas.
True
False

16. When the speed of the pump increases, its net positive suction head (NPSH) requirement decreases.
Agree
Disagree

17. Sampling method of determining standard time is profitable for long cycle operation.
Correct
Incorrect

18. In oblique cutting system, the maximum chip thickness occurs at the middle.
Correct
Incorrect

19. The universal gas constant of a gas is the product of molecular mass of the gas and the gas constant.
Correct
Incorrect

20. In orthogonal cutting system, the maximum chip thickness occurs at the middle.
Correct
Incorrect

     Score =

Correct answers:


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