Air Compressor - Air Compressor objective questions and answers

21. Volumetric efficiency of a compressor with clearance volume.......

   A.Volumetric efficiency of a compressor with clearance volume

   B.Decreases with increase in compression ratio Compressed air

   C.In not dependent upon compression ratio

   D.May increase or decrease depending on compressor capacity

22. Volumetric efficiency of a compressor without clearance volume.......

   A.Increases with increase in compression ratio

   B.Decreases with increase in compression ratio

   C.In not dependent upon compression ratio

   D.May increase or decrease depending on compressor capacity

23. The clearance volume of the air compressor is kept minimum because .........

   A.It allows maximum compression to be achieved

   B.It greatly affects volumetric efficiency

   C.It results in minimum work

   C.It permits isothermal compression

24. Compressor mostly used for supercharging of IC engines is ......

   A.Radial flow compressor

   B.Axial from compressor

   C.Roots blower

   D.Reciprocating compressor

25. The rotary compressors are used for delivering.......

   A.Small quantities of air at high-pressure

   B.Large quantities of air at high-pressure

   C.Small quantities of air at low pressures

   D.Large quantities of air at a low pressures

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