Same as isothermal
Same as adiabatic
Better than isothermal and adiabatic
In between isothermal and adiabatic
D. In between isothermal and adiabatic
Compressor efficiency
Isothermal efficiency
Volumetric efficiency
Mechanical efficiency
0.1 %
0.5 %
1.0 %
5 %
Increase first at fast rate and then slow
Increase first at slow rate and then fast
Decrease continuously
First increase, reach maximum and then decrease
Turbojet
Turbo-propeller
Rocket
Ramjet
Adding heat exchanger
Injecting water in/around combustion chamber
Reheating the air after partial expansion in the turbine
All of the above
3 m³/ mt.
1.5 m³/ mt.
18 m³/ mt.
6 m³/ mt.
One adiabatic, two isobaric, and one constant volume
Two adiabatic and two isobaric
Two adiabatic, one isobaric and one constant volume
One adiabatic, one isobaric and two constant volumes
Mechanical efficiency
Volumetric efficiency
Isothermal efficiency
Adiabatic efficiency
Less
More
Same
May be less or more depending upon speed
Exit nozzle, which is a constant volume process
Exit nozzle, which is essentially an isentropic process
Turbine blades, which is a constant volume process
Turbine blades, which is essentially an isentropic process
p₂ = p₁ × p₃
p₂ = p₁/p₃
p₂ = p₁ × p₂
p₂ = p₃/p₁
Injecting water into the compressor
Burning fuel after gas turbine
Injecting ammonia into the combustion chamber
All of the above
Work factor
Slip factor
Degree of reaction
Pressure coefficient
Turbojet engine
Ramjet engine
Propellers
Rockets
Low speeds
High speeds
Low altitudes
High altitudes
Low frontal area
Higher thrust
High pressure rise
None of these
1 : 1.2
1 : 2
1 : 5
1 : 10
Small quantities of air at high pressures
Large quantities of air at high pressures
Small quantities of air at low pressures
Large quantities of air at low pressures
Start-stop motor
Constant speed unloader
Relief valve
Variable speed
Equal to
Less than
More than
None of these
Compression ratio
Work ratio
Pressure ratio
None of these
Has no effect on
Decreases
Increases
None of these
Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
Volume of air delivered by the compressor
Volume of air sucked by the compressor during its suction stroke
None of the above
10 : 1
15 : 1
20 : 1
60 : 1
Isothermal h.p. to the BHP of motor
Isothermal h.p. to adiabatic h.p.
Power to drive compressor to isothermal h.p.
Work to compress air isothermally to work for actual compression
Air stream blocking the passage
Motion of air at sonic velocity
Unsteady periodic and reversed flow
Air stream not able to follow the blade contour
Net work output and heat supplied
Net work output and work done by turbine
Actual heat drop and isentropic heat drop
Net work output and isentropic heat drop
Compressor efficiency
Isentropic efficiency
Euler's efficiency
Pressure coefficient
Gas turbine
4-stroke petrol engine
4-stroke diesel engine
Multi cylinder engine
1 bar
16 bar
64 bar
256 bar