Mechanical Engineering Quiz - Set 06


1. Incoloy, Hastelloy and Vitallium are _________ temperature alloys.
High
Low

2. The material of pipe lines for a system using ammonia as a refrigerant should be copper.
Yes
No

3. In gas turbines, the work input with intercooling is ________ the work input with no intercooling.
Less than
More than

4. In a fuel injection system, the electronic control module (ECM) calculates the optimum fuel injection volume for the engine condition based on the data received from the sensors, and injects this volume of fuel into the intake manifold at the optimum timing.
Correct
Incorrect

5. In an impulse turbine, the jet of water impinges on the bucket with a low velocity and after flowing over the vanes, leaves with a high velocity.
True
False

6. In diesel engines, the fuel is injected in the form of very fine spray, into the engine cylinder, which gets ignited due to high temperature of the compressed air.
Agree
Disagree

7. The planning and scheduling of job order manufacturing differ from planning and scheduling of mass production manufacturing.
Correct
Incorrect

8. When the back gear is engaged in a back geared headstock, the spindle speed reduces considerably.
Agree
Disagree

9. The temperature of condensate is __________ on leaving the condenser than that of circulating water at inlet.
Higher
Lower

10. In continuous chip cutting, the maximum heat is taken by the cutting tool.
Yes
No

11. In inventory control, the economic ordering quantity is obtained by the quantity whose procurement cost is equal to inventory carrying cost.
True
False

12. The detonating tendency in petrol engines increases with increase of compression ratio.
True
False

13. The capacity of a hydraulic accumulator is generally specified as the maximum amount of energy stored.
True
False

14. The greater the pressure difference in throttling, the lesser is the irreversibility.
Yes
No

15. The compressor capacity will be ________ if the temperature of intake air is lowest.
Lowest
Highest

16. The wave length corresponding to the maximum energy is inversely proportional to the absolute temperature. This statement is called Planck's law.
Yes
No

17. The iron ore in the charge of blast furnace acts as an iron bearing mineral.
True
False

18. The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water.
True
False

19. A draught produced by a chimney due to the difference of densities between the hot gases inside the chimney and cold atmospheric air outside it, is called natural draught.
Yes
No

20. A closed system is one in which heat and work crosses the boundary of the system but the mass of the working substance does not crosses the boundary of the system.
Yes
No

     Score =

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