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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
For speed above 3000 km/hour, it is more advantageous to use

Turbojet engine
Propellers
Rockets
Ramjet engine

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Compressors, Gas Turbines and Jet Engines
The net work input required for compressor with increase in clearance volume

Remains same
Decreases
Increases/decreases depending on compressor capacity
Increases

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Compressors, Gas Turbines and Jet Engines
Standard air is the air at

15°C and 1 kg/cm²
Atmospheric conditions at any specific location
0°C and standard atmospheric conditions
20°C and 1 kg/cm² and relative humidity 36%

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Compressors, Gas Turbines and Jet Engines
The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is

More
More/less depending on compressor capacity
Same
Less

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Compressors, Gas Turbines and Jet Engines
Gas turbine cycle with regenerator

Increases thermal efficiency
Allows operation at very high altitudes
Decreases heat loss is exhaust
Allows high compression ratio

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Compressors, Gas Turbines and Jet Engines
A closed gas turbine in which fuel is burnt directly in the air is not possible because of

Increasing gas temperature
High friction losses
Paucity of O2
High specific volume

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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