Mechanical Engineering Questions And Answers :: Compressors: part3



Mechanical Engineering : Compressors QUESTIONS AND ANSWERS :: part3 : 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.Pick up the wrong statement about advantages of multistage compression

better lubrication is possible advantages of multistage
more loss of air due to leakage past the cylinder
mechanical balance is better
air can be cooled perfectly in between
more uniform torque, light cylinder and saving in work.

2.For a compressor, least work will be done if the compression is

is entropic
isothermal
poly tropic
somewhere in between is entropic and isothermal
none of the above.

3.For slow-speed large capacity compressor, following type of valve will be best suited

poppet valve
mechanical valve of the corliss, sleeve, rotary or semirotary type
disc or feather type
any of the above
none of the above.

4.More than one stage will be preferred for reciprocating compressor if the delivery pressure is more than

2 kg/cm2
6 kg/cm2
10 kg/cm2
14.7 kg/cm2
none of the above.

5.The ratio of isentropic work to Euler work is known as

pressure coefficient
work coefficient
polytropic reaction
slip factor
compressor efficiency.

More Compressors QUESTIONS AND ANSWERS available in next pages

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