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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Reheating in a gas turbine

Increases the turbine work
Decreases the thermal efficiency
Increases the thermal efficiency
Increases the compressor work

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Compressors, Gas Turbines and Jet Engines
The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio

First increases and then decreases
Increases
Decreases
First decreases and then increases

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Compressors, Gas Turbines and Jet Engines
With the decrease in compression ratio, the volumetric efficiency

Decreases
First decrease and then increase
Does not change
Increases

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Compressors, Gas Turbines and Jet Engines
The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is

Same
Low/high depending on make and type
Low
High

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Compressors, Gas Turbines and Jet Engines
The mass of gas turbine per kW developed is about ________ as that of an I.C. engine.

One fourth
One sixth
One-half
Same

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Compressors, Gas Turbines and Jet Engines
For supplying intermittent small quantity of air at high pressure, following compressor is best suited

Centrifugal
Screw
Reciprocating
Axial

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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