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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Water is injected in gas turbine cycle to

Control output of turbine
Control fire hazards
Control temperature
Increase efficiency

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Compressors, Gas Turbines and Jet Engines
Gas turbine as compared to internal combustion engine

Can be driven at a very high speed
All of the listed here
Has more efficiency
Produces uniform torque

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Compressors, Gas Turbines and Jet Engines
For slow speed large capacity compressor, following type of valve will be best suited

Poppet valve
Disc or feather type
Any of the above
Mechanical valve of the Corliss, sleeve, rotary or semi rotary type

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Compressors, Gas Turbines and Jet Engines
The advantage of multistage compression over single stage compression is

Decreased discharge temperature
Lower power consumption per unit of air delivered
All of these
Higher volumetric efficiency

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Compressors, Gas Turbines and Jet Engines
The ratio of isentropic work to Euler’s work is known as

Pressure coefficient
Isentropic efficiency
Euler
Compressor efficiency

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Compressors, Gas Turbines and Jet Engines
The blades of gas turbine are made of

Stainless steel
High nickel alloy
High alloy steel
Carbon steel

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