In multistage compressor, the isothermal compression is achieved by_________________?

A. Employing intercooler
B. By constantly cooling the cylinder
C. By running compressor at very slow speed
D. By insulating the cylinder

Mining industry usually employs following motive power___________________?

A. c. electric motor
B. Compressed air
C. Petrol engine
D. Diesel engine

Separators in compressor installations are located_____________________?

A. Before intercooler
B. After intercooler
C. After receiver
D. Between after-cooler and air receiver

An air compressor may be controlled by____________________?

A. Throttle control
B. Clearance control
C. Blow-off control
D. Any one of the above

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

The compressor performance at higher altitude compared to sea level will be _______________?

A. Same
B. Higher
C. Lower
D. Dependent on other factors

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

A compressor at high altitude will draw________________?

A. More power
B. Less power
C. Same power
D. More/less power depending on other factors

The thrust on the rotor in a centrifugal compressor is produced by________________?

A. Radial component
B. Axial component
C. Tangential component
D. Resultant component

The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is_____________________?

A. Less
B. More
C. Same
D. More/less depending on compressor capacity