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
C. Both (A) and (B)
Cool the air
Decrease the delivery temperature for ease in handling
Cause moisture and oil vapour to drop out
Reduce volume
Equal to
Less than
More than
None of these
Standard air
Free air
Compressed air
Compressed air at delivery pressure
Equal to
Less than
More than
None of these
No flow of air
Fixed mass flow rate regardless of pressure ratio
Reducing mass flow rate with increase in pressure ratio
Increased inclination of chord with air steam
Directly proportional to clearance volume
Greatly affected by clearance volume
Not affected by clearance volume
Inversely proportional to clearance volume
As large as possible
As small as possible
About 50% of swept volume
About 100% of swept volume
Carries its own oxygen
Uses surrounding air
Uses compressed atmospheric air
Does not require oxygen
Free air delivery
Compressor capacity
Swept volume
None of these
Electric motor
Engine
Either (A) or (B)
None of these
Same
More
Less
Depends on other factors
Before the intercooler
After the intercooler
Between the aftercooler and receiver
Before first stage suction
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.
Compressor efficiency
Volumetric efficiency
Isothermal efficiency
Mechanical efficiency
Increases
Decreases
Remain same
First increases and then decreases
Centrifugal type
Reciprocating type
Lobe type
Axial flow type
0.1 bar and 20°C
1 bar and 20°C
0.1 bar and 40°C
1 bar and 40°C
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
Same as isothermal
Same as adiabatic
Better than isothermal and adiabatic
In between isothermal and adiabatic
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 work and turbine work
Output and input
Actual total head temperature drop to the isentropic total head drop from total head inlet to static head outlet
Actual compressor work and theoretical compressor work
High nickel alloy
Stainless steel
Carbon steel
High alloy steel
Ratio of shaft output of the air motor to the shaft input to the compressor
Ratio of shaft input to the compressor to the shaft output of air motor
Product of shaft output of air motor and shaft input to the compressor
None of the above
r -1
1 - r -1
1 - (1/r) -1/
1 - (1/r) /-1
34 %
50 %
60 %
72 %
1 - k + k (p₁/p₂)1/n
1 + k - k (p₂/p₁)1/n
1 - k + k (p₁/p₂) n- 1/n
1 + k - k (p₂/p₁) n-1/n
Isothermally
Adiabatically
Isentropically
Isochronically
Compressor efficiency
Volumetric efficiency
Isothermal efficiency
Mechanical efficiency
Increase velocity
Make the flow streamline
Convert pressure energy into kinetic energy
Convert kinetic energy into pressure energy
Gas turbine plant
Petrol engine
Diesel engine
Solar plant