Mechanical Engineering Quiz - Set 05 - ObjectiveBooks

Mechanical Engineering Quiz - Set 05

Quiz Questions

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

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

03. PERT is an event oriented technique.

04. The efficiency of a centrifugal pump will be maximum when the blades are bent backward.

05. The water, alcohol and ammonia have same refrigerating effect at different altitudes.

06. In nuclear power plants, due to reflector, less fuel is needed to generate sufficient neutrons to sustain a chain reaction.

07. 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.

08. Light weight substances cannot be effective moderators.

09. The discharge of a centrifugal pump working under constant head ________ with the speed.

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.

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

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

13. In a centrifugal compressor, the air enters the impeller axially and leaves the vane radially.

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

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

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

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

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

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

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

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