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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Euler's equation can be used for

Pumps
Radial flow compressors
Axial flow compressors
All of these

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Compressors, Gas Turbines and Jet Engines
The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)

r ɣ-1
1 - (1/r) ɣ/ɣ-1
1 - (1/r) ɣ-1/ɣ
1 - r ɣ-1

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Compressors, Gas Turbines and Jet Engines
The efficiency of a jet engine is higher at

Low altitudes
High speeds
Low speeds
High altitudes

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Compressors, Gas Turbines and Jet Engines
Atmospheric pressure is 1.03 kg/cm and vapour pressure is 0.03 kg/cm. The air pressure will be

1.03 kg/cm²
0.53 kg/cm²
1.00 kg/cm²
1.06 kg/cm²

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Compressors, Gas Turbines and Jet Engines
In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at

Diffuser inlet radius
Impeller outlet radius
Impeller inlet radius
Diffuser outlet radius

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Compressors, Gas Turbines and Jet Engines
The compression ratio for the compressor is always _________ unity.

Less than
Equal to
More than
None of these

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