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
C. Is not dependent upon compression ratio
Compressor capacity
Compression ratio
Compressor efficiency
Mean effective pressure
Heated
Compressed air before entering the combustion chamber is heated
Bled gas from turbine is heated and readmitted for complete expansion
Exhaust gases drive the compressor
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
1 : 1.2
1 : 2
1 : 5
1 : 10
One air stream
Two or more air streams
No air stream
Solid fuel firing
Equal to
Less than
More than
None of these
Free air delivery
Compressor capacity
Swept volume
None of these
The reciprocating compressors are best suited for high pressure and low volume capacity
The effect of clearance volume on power consumption is negligible for the same volume of discharge
Both (A) and (B)
None of these
Less power requirement
Better mechanical balance
Less loss of air due to leakage past the cylinder
Lower volumetric efficiency
Increases
Decreases
Remain unaffected
May increase or decrease depending on compressor capacity
Pressure coefficient
Work coefficient
Polytropic reaction
Slip factor
1 bar
16 bar
64 bar
256 bar
Thrust power and fuel energy
Engine output and propulsive power
Propulsive power and fuel input
Thrust power and propulsive power
Rise gradually towards the point of use
Drop gradually towards the point of use
Be laid vertically
Be laid exactly horizontally
Same
More
Less
Depends on other factors
More
Less
Same
Depends on other factors
200°C
500°C
700°C
1000°C
Remain same
Decrease
Increase
None of the above
Work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio
Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor
Volume of free air delivery per stroke to the swept volume of the piston
Isentropic power to the power required to drive the compressor
Compressor pressure ratio
Highest pressure to exhaust pressure
Inlet pressure to exhaust pressure
Pressures across the turbine
Compressor efficiency
Isentropic efficiency
Euler's efficiency
Pressure coefficient
Temperature during compression remains constant
No heat leaves or enters the compressor cylinder during compression
Temperature rise follows a linear relationship
Work done is maximum
Large discharge at high pressure
Low discharge at high pressure
Large discharge at low pressure
Low discharge at low pressure
Before intercooler
After intercooler
After receiver
Between after-cooler and air receiver
Back pressure
Critical pressure
Discharge pressure
None of these
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
Carbonisation of coal
Passing steam over incandescent coke
Passing air and a large amount of steam over waste coal at about 65°C
Partial combustion of coal, eke, anthracite coal or charcoal in a mixed air steam blast
Increases
Decreases
First increases and then decreases
First decreases and then increases
0.5 kg
1.0 kg
1.3 kg
2.2 kg
Low speeds
High speeds
Low altitudes
High altitudes