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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The stagnation pressure rise in a centrifugal compressor takes place

In the impeller only
In the diffuser only
In the inlet guide vanes only
In the diffuser and impeller

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Compressors, Gas Turbines and Jet Engines
In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of

Vacuum
Compressed air
Atmospheric air
Oxygen alone

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Compressors, Gas Turbines and Jet Engines
Gas turbine as compared to steam turbine

Requires less space for installation
All of these
Has less efficiency
Has compressor and combustion chamber

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Compressors, Gas Turbines and Jet Engines
For an irreversible gas turbine cycle, the efficiency and work ratio both depend on

Both pressure ratio and maximum cycle temperature
Pressure ratio alone
Minimum cycle temperature alone
Maximum cycle temperature alone

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

Stainless steel
High alloy steel
Carbon steel
High nickel alloy

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Compressors, Gas Turbines and Jet Engines
Isothermal compression efficiency, even when running at high speed, can be approached by using

Fully insulating the cylinder
Cold water spray
Both (A) and (B) above
Multistage compression

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