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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The hottest point in a gas turbine is

at the base
in the center
at the tip
between ~ to i of the blade height

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Compressors, Gas Turbines and Jet Engines
The pressure of air at the beginning of the compression stroke is ___ the atmospheric pressure.

Less than
More than
None of the listed here
Equal to

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Compressors, Gas Turbines and Jet Engines
Which is false statement about advantages of multistage compressor in comparison to single stage compressor?

Less power requirement
Lower volumetric efficiency
Less loss of air due to leakage past the cylinder
Better mechanical balance

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Compressors, Gas Turbines and Jet Engines
The ideal efficiency of simple gas turbine cycle depends on

Minimum cycle temperature
Maximum cycle temperature
All of these
Pressure ratio

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Compressors, Gas Turbines and Jet Engines
The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ = Workdone due to back flow)

(W₁ + W₂)/W₁
W₂/(W₁ + W₂)
W₁/(W₁ + W₂)
(W₁ + W₂)/W₂

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Compressors, Gas Turbines and Jet Engines
In which case the air-fuel ratio is likely to be maximum?

4-stroke petrol engine
4-stroke diesel engine
Gas turbine
Multi cylinder engine

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