Isothermal
Adiabatic
Polytropic
None of the above
B. Adiabatic
Compression index
Compression ratio
Compressor efficiency
Mean effective pressure
The ratio of stroke volume to clearance volume
The ratio of the air actually delivered to the amount of piston displacement
Reciprocal of compression ratio
Index of compressor performance
Pressure ratio alone
Maximum cycle temperature alone
Minimum cycle temperature alone
Both pressure ratio and maximum cycle temperature
Mass flow rate
Pressure ratio
Change in load
Stagnation pressure at the outlet
Large gas turbines use radial inflow turbines
Gas turbines have their blades similar to steam turbine
Gas turbine's blade will appear as impulse section at the hub and as a reaction section at tip
Gas turbines use both air and liquid cooling
Less power requirement
Better mechanical balance
Less loss of air due to leakage past the cylinder
Lower volumetric efficiency
Same
More
Less
Zero
Increase
Decrease
Remain unaffected
Other factors control it
Compressor
Heating chamber
Cooling chamber
All of these
Cools the delivered air
Results in saving of power in compressing a given volume to given pressure
Is the standard practice for big compressors
Enables compression in two stages
Equal to
Less than
Greater than
None of these
0.1 %
0.5 %
1.0 %
5 %
Same
One-half
One fourth
One sixth
Low frontal area
Higher thrust
High pressure rise
None of these
Employing intercooler
By constantly cooling the cylinder
By running compressor at very slow speed
By insulating the cylinder
Brayton or Atkinson cycle
Carnot cycle
Rankine cycle
Erricson cycle
To increase the output
To increase the efficiency
To save fuel
To reduce the exit temperature
High nickel alloy
Stainless steel
Carbon steel
High alloy steel
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
The atmosphere
A source at 0°C
A source of low temperature air
A source of high temperature air
Pressure coefficient
Work coefficient
Polytropic reaction
Slip factor
Electric motor
Engine
Either (A) or (B)
None of these
Isothermal compression
Adiabatic compression
Isentropic compression
Polytropic compression
Increase velocity
Make the flow streamline
Convert pressure energy into kinetic energy
Convert kinetic energy into pressure energy
Atmosphere
Vacuum
Discharge nozzle
Back to the compressor
Is self operating at zero flight speed
Is not self operating at zero flight speed
Requires no air for its operation
Produces a jet consisting of plasma
2 kg/cm²
6 kg/cm²
10 kg/cm²
14.7 kg/cm²
7 : 1
15 : 1
30 : 1
50 : 1.
Back pressure
Critical pressure
Discharge pressure
None of these
10 bar
20 bar
30 bar
50 bar