Centrifugal type
Axial flow type
Radial flow type
None of these
B. Axial flow type
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.
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
Throttle control
Clearance control
Blow off control
Any one of the above
Has no effect on
Decreases
Increases
None of these
0.5 kg
1.0 kg
1.3 kg
2.2 kg
Equal to
Less than
More than
None of these
30 : 1
40 : 1
50 : 1
60 : 1
Increase temperature
Reduce turbine size
Increase power output
Increase speed
Large discharge at high pressure
Low discharge at high pressure
Large discharge at low pressure
Low discharge at low pressure
0.1 %
0.5 %
1.0 %
5 %
Gas turbine plant
Petrol engine
Diesel engine
Solar plant
kg/m²
kg/m³
m³/min
m³/kg
Increases
Decreases
Remains same
Increases/decreases depending on compressor capacity
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 calorific value
Ease of atomisation
Low freezing point
Both (A) and (C) above
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
Increase in flow
Decrease in flow
Increase in efficiency
Increase in flow and decrease in efficiency
Pressure coefficient
Work coefficient
Polytropic reaction
Slip factor
Liquid hydrogen
High speed diesel oil
Kerosene
Methyl alcohol
W₁/W₂ = n₂(n₁ - 1)/n₁(n₂ - 1)
W₁/W₂ = n₁(n₂ - 1)/n₂(n₁ - 1)
W₁/W₂ = n₁/n₂
W₁/W₂ = n₂/n₁
Start-stop motor
Constant speed unloader
Relief valve
Variable speed
More power
Less power
Same power
More/less power depending on other factors
Increase velocity
Make the flow streamline
Convert pressure energy into kinetic energy
Convert kinetic energy into pressure energy
Compressor efficiency
Volumetric efficiency
Isothermal efficiency
Mechanical efficiency
Increases the thermal efficiency
Increases the compressor work
Increases the turbine work
Decreases the thermal efficiency
Atmospheric
Slightly more than atmospheric
Slightly less than atmospheric
Pressure slightly less than atmospheric and temperature slightly more than atmospheric
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
Paucity of O2
Increasing gas temperature
High specific volume
High friction losses
Employing intercooler
By constantly cooling the cylinder
By running compressor at very slow speed
By insulating the cylinder
Isothermal compression
Isentropic compression
Polytropic compression
None of these