Mechanical Engineering Questions And Answers :: Compressors: part1



Mechanical Engineering : Compressors QUESTIONS AND ANSWERS :: part1 : 11 to 15

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

11.The work done per unit mass of air in compression will'be least when n is equal to

1
1.2 ,
1.3
1.4
1.5

12.Adiabatic compression is one in which

temperature during compression remains constant
no heat leaves or enters the compressor cylinder during compression
temperature rise follows a linear relationship
work done is maximum
entropy decreases.

13.Cylinder clearance in a compressor should be

as large as possible
as small as possible
about 50% of swept volume
about 100% of swept volume
none of the above.

14.The ratio of work done per cycle to the swept volume in case of compressor is called

compression index
compression ratio
compressor efficiency
mean effective pressure
compressor effectiveness.

15.Inter cooling in compressors

cools the delivered air
results in saving of power in compressing a given volume to given pressure
is the standard practice for big compressors
enables compression in two stages
prevents compressor jacket running very hot.

More Compressors QUESTIONS AND ANSWERS available in next pages

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