25) Clearance volume in actual reciprocating compressors is essential

to accommodate Valves in the cylinder head

to provide cushioning effect

to attain high volumetric efficiency

to provide cushioning effect and also to avoid mechanical bang of piston with cylinder head.

Answer is:

to provide cushioning effect and also to avoid mechanical bang of piston with cylinder head.

increases

decreases

remains same

increases/decreases depending on com-pressor capacity

Answer is:

compressor efficiency

isothermal efficiency

volumetric efficiency

mechanical efficiency

Answer 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

Answer is:

20-30%

40-50%

60-70%

70-90%

Answer is: