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An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes

A.	one adiabatic, two isobaric, and one constant volume	B.	two adiabatic and two isobaric
C.	two adiabatic, one isobaric and one constant volume	D.	one adiabatic, one isobaric and two constant volume

As the value of index '«' is decreased, the volumetric efficiency will

A.	increase	B.	decrease
C.	remain unaffected	D.	may increase/decrease depending on compressor clearance

Cylinder clearance in a compressor should be

A.	as large as possible	B.	as small as possible
C.	about 50% of swept volume	D.	about 100% of swept volume

10.

Diffuser in a compressor is used to

A.	increase velocity	B.	make the flow stream-line
C.	convert pressure energy into kinetic energy	D.	convert kinetic energy into pressure energy

11.

During base load operation, the best method of controlling compressor is

A.	start-stop motor	B.	constant speed unloaded
C.	relief valve	D.	variable speed

12.

During peak load periods, the best method of controlling compressors is

A.	start-stop motor	B.	constant speed unloader
C.	relief valve	D.	variable speed

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