Mechanical Engineering Questions And Answers :: Compressors: part2



Mechanical Engineering : Compressors QUESTIONS AND ANSWERS :: part2 : 1 to 5

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2014 and IES 2014 examinations :

1.Volumetric efficiency is

the ratio of stroke volume to clearance volume
the ratio of the air actually delivered to the amount of piston displacement
reciprocal of compression ratio
index of compressor performance
proportional to compression ratio.

2.To avoid moisture troubles, the branch connections from compressed air lines should be taken from

top side of main
bottom side of main
left side of main
right side of main
any location.

3.After-cooler is used to

cool the air
decrease the delivery temperature for ease in handling
cause moisture and oil vapour to drop out
reduce volume
increase pressure.

4.Which is false statement about multistage compression .

Power consumption per unit of air delivered is low
Volumetric efficiency is high
It is best suited for compression ratios around 7:1
The moisture in air is condensed in the intercooler
Outlet temperature is reduced.

5.Ratio of indicated h.p. to shaft h.p. in known as

compressor efficiency
isothermal efficiency
volumetric efficiency
mechanical efficiency
adiabatic efficiency.

More Compressors QUESTIONS AND ANSWERS available in next pages

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