p₂/p₁ = p₃/p₂ = p₄/p₃
p₃/p₁ = p₄/p₂
p₁ p₂ = p₃ p₄
p₁ p₃ = p₂ p₄
A. p₂/p₁ = p₃/p₂ = p₄/p₃
Decreasing the compression work
Increasing the compression work
Increasing the turbine work
Both (A) and (C) above
Before the intercooler
After the intercooler
Between the aftercooler and receiver
Before first stage suction
Isothermal
Isentropic
Adiabatic
Isochoric
Increases the thermal efficiency
Increases the compressor work
Increases the turbine work
Decreases the thermal efficiency
Lower heating value
Higher heating value
Heating value
Higher calorific value
Paucity of O2
Increasing gas temperature
High specific volume
High friction losses
A.C. electric motor
Compressed air
Petrol engine
Diesel engine
Increases
Decreases
Remains same
Increases/decreases depending on compressor capacity
Liquid hydrogen
High speed diesel oil
Kerosene
Methyl alcohol
Turbojet engine
Ramjet engine
Propellers
Rockets
Same as isothermal
Same as adiabatic
Better than isothermal and adiabatic
In between isothermal and adiabatic
The flow of air is parallel to the axis of the compressor
The static pressure of air in the impeller increases in order to provide centripetal force on the air
The impeller rotates at high speeds
The maximum efficiency is higher than multistage axial flow compressors
1 to 5 bar
5 to 8 bar
8 to 10 bar
10 to 15 bar
Electric motor
Engine
Either (A) or (B)
None of these
Radial flow
Axial flow
Centrifugal
None of the above
Free air delivery
Compressor capacity
Swept volume
None of these
Increases as clearance volume increases
Decreases as clearance volume increases
Is independent of clearance volume
Increases as clearance volume decreases
Isothermal compression
Isentropic compression
Polytropic compression
None of these
Equal to
Less than
More than
None of these
Equal to
Less than
More than
None of these
Pressure ratio
Maximum cycle temperature
Minimum cycle temperature
All of the above
Isothermal compression
Isentropic compression
Polytropic compression
None of these
1 : 1.2
1 : 2
1 : 5
1 : 10
1 bar
16 bar
64 bar
256 bar
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
Compressor efficiency
Isentropic efficiency
Euler's efficiency
Pressure coefficient
Blade camber
Blade camber and incidence angle
Spacechord ratio
Blade camber and spacechord ratio
Closed cycle gas turbine is an I.C engine
Gas turbine uses same working fluid over and over again
Ideal efficiency of closed cycle gas turbine plant is more than Carnot cycle efficiency
Thrust in turbojet is produced by nozzle exit gases.
Zero
Less
More
Same
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