Related Questions

Inter-cooling in multistage compressors is done
A To cool the air during compression
B To cool the air at delivery
C To enable compression in two stages
D To minimize the work of compression
Centrifugal compressors compared to reciprocating compressors
A Require less space
B Have quieter operation
C Have lower operating costs
D All of the above
When the temperature of air leaving the inter-cooler, in a two stage compression with inter-cooler, is ________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.
A Equal to
B Less than
C More than
D None of these
Inter-cooling in gas turbine results in
A Increase in net output but decrease in thermal efficiency
B Increase in thermal efficiency but decrease in net output
C Increase in both thermal efficiency and net output
D Decrease in both thermal efficiency and net output
Rotary compressors are suitable for
A Large discharge at high pressure
B Low discharge at high pressure
C Large discharge at low pressure
D Low discharge at low pressure
The motor used for the compressors is
A d.c. series motor
B shaded pole motor
C capacitor-start capacitor-run motor
D reluctance motor
Rotary compressors are used for delivering
A Small quantities of air at high pressures
B Large quantities of air at high pressures
C Small quantities of air at low pressures
D Large quantities of air at low pressures
In air compressors, free air delivery means the
A Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
B Volume of air delivered by the compressor
C Volume of air sucked by the compressor during its suction stroke
D None of the above
The degree of reaction is usually kept ________ for all types of axial flow compressors.
A 0.2
B 0.3
C 0.4
D 0.5
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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