Mechanical Engineering Quiz - set 04


1. Maximum work is saved in a two stage reciprocating air compressor with incomplete inter-cooling.
Agree
Disagree

2. The bloom is smaller than a billet.
True
False

3. In the first law of thermodynamics, the total energy of the system remains constant.
True
False

4. Coal gas is obtained by mixing coal and gas at ambient conditions.
Yes
No

5. A steel containing 12 to 14% chromium and 0.12 to 0.35% carbon is called martenistic stainless steel.
True
False

6. In a compressor, work is done on the piston during suction of air and work is done by the piston during compression as well as delivery of air.
Agree
Disagree

7. The function of a carburettor is to control the amount and ratio of air-fuel mixture.
True
False

8. In big automobile repair shop, for elevating and moving the heavy parts such as complete engine assembly, gear box etc., an overhead crane and a fork lift truck is used.
Yes
No

9. In open combustion chamber in diesel engines, the shape and layout of the piston crown, the inlet port and the valve produce the turbulent effect of fuel mixture.
True
False

10. Representative time is the average of times recorded by work study man for an operation.
Agree
Disagree

11. Loeffler boiler is a water tube boiler using a forced circulation of water.
True
False

12. The ratio of the heat equivalent to one kW hour to the heat in fuel per B.P. hour is termed as brake thermal efficiency.
Yes
No

13. Lamont boiler is a high pressure water tube steam boiler working on forced circulation.
Agree
Disagree

14. A water cooled condenser operates at a ________ condensing temperature than an air-cooled condenser.
Higher
Lower

15. Work done by a turbine ________ upon the weight of water flowing per second.
Depends
Does not depend

16. In a centrifugal casting method, the impurities are collected in the centre of the casting.
Yes
No

17. The thermodynamic property of a system is said to be an intensive property whose value for the entire system __________ the sum of their value for the individual parts of the system.
Is equal to
Is not equal to

18. The relative humidity decreases as air gets wet.
True
False

19. The absolute pressure of a given mass of a perfect gas varies inversely as its volume, when the temperature remains constant. This statement is known as Charles' law.
Yes
No

20. In a reciprocating pump, air vessels are fitted to the suction pipe and delivery pipe close to the cylinder of the pump.
True
False

     Score =

Correct answers:

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