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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In a jet engine, the air-fuel ratio is

1.6673611111111
2.5006944444444
2.0840277777778
1.2506944444444

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Compressors, Gas Turbines and Jet Engines
During base load operation, the best method of controlling compressor is

Start-stop motor
Relief valve
Variable speed
Constant speed unloader

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Compressors, Gas Turbines and Jet Engines
The compression ratio in a gas turbine is of the order of

3.5 : 1
0.50069444444444
0.20902777777778
0.33402777777778

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Compressors, Gas Turbines and Jet Engines
If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by

1 + k - k (p₂/p₁) n-1/n
1 - k + k (p₁/p₂)1/n
1 - k + k (p₁/p₂) n- 1/n
1 + k - k (p₂/p₁)1/n

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor falls roughly as follows for every 5°C increase in atmospheric temperature

0.01
0.001
0.005
0.05

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

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

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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