Two times
Three times
Four times
Six times
D. Six times
Same
Lower
Higher
None of these
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
Lower at low speed
Higher at high altitudes
Same at all altitudes
Higher at high speed
Pressure drop across the valves
Superheating in compressor
Clearance volume and leakages
All of these
Pressure ratio
Pressure coefficient
Degree of reaction
Slip factor
Compressor efficiency
Isentropic efficiency
Euler's efficiency
Pressure coefficient
H.P. compressor is connected to H.P. turbine and L.P. compressor to L.P. turbine
H.P. compressor is connected to L.P. turbine and L.P. compressor is connected to H.P. turbine
Both the arrangements can be employed
All are connected in series
Work done in first stage should be more
Work done in subsequent stages should increase
Work done in subsequent stages should decrease
Work done in all stages should be equal
Lower power consumption per unit of air delivered
Higher volumetric efficiency
Decreased discharge temperature
All of the above
Gas turbine requires lot of cooling water
Gas turbine is capable of rapid start up and loading
Gas turbines has flat efficiency at part loads
Gas turbines have high standby losses and require lot of maintenance
Same
One-half
One fourth
One sixth
Mechanical efficiency
Volumetric efficiency
Isothermal efficiency
Adiabatic efficiency
Same
Less
More
None of these
Does not change
Increases
Decreases
First decrease and then increase
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
Electric motor
Engine
Either (A) or (B)
None of these
Requires less space for installation
Has compressor and combustion chamber
Has less efficiency
All of these
In two phases
In three phases
In a single phase
In the form of air and water mixture
Before the intercooler
After the intercooler
Between the aftercooler and receiver
Before first stage suction
Ideal compression
Adiabatic compression
Isentropic compression
Isothermal compression
The propulsive matter is caused to flow around the propelled body
Propulsive matter is ejected from within the propelled body
Its functioning does not depend on presence of air
All of the above
To cool the air during compression
To cool the air at delivery
To enable compression in two stages
To minimise the work of compression
Pressure coefficient
Work coefficient
Polytropic reaction
Slip factor
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
In a two stage reciprocating air compressor with complete intercooling, maximum work is saved.
The minimum work required for a two stage reciprocating air compressor is double the work required for each stage.
The ratio of the volume of free air delivery per stroke to the swept volume of the piston is called volumetric efficiency.
None of the above
To increase the output
To increase the efficiency
To save fuel
To reduce the exit temperature
Isothermally
Polytropically
Isentropically
None of these
0.2
0.3
0.4
0.5
Less
More
Same
More/less depending on compressor capacity
Increases with increase in compression ratio
Decreases with increase in compression ratio
Is not dependent upon compression ratio
May increase/decrease depending on compressor capacity