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1.

A centrifugal compressor works on the principle of                        
A. conversion of pressure energy into kinetic energy B. conversion of kinetic energy into pres¬sure energy
C. centripetal action D. generating pressure directly



2.

A compressor at high altitude will draw                        
A. more power B. less power
C. same power D. more/less power depending on other factors



3.

Aeroplanes employ following type of compressor                        
A. radial flow B. axial flow
C. centrifugal D. combination of above




4.

After-cooler is used to                        
A. cool the air B. decrease the delivery temperature for ease in handling
C. cause moisture and oil vapour to drop out D. reduce volume



5.

An air compressor may be controlled by                        
A. throttle control B. clearance control
C. blow-off control D. any one of the above



6.

An ideal air compressor cycle with 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



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