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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The work-done on a compressor will be minimum if air is taken from

A source of high temperature air
A source at 0° C
The atmosphere
A source of low temperature air

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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
For minimum work required to compress and deliver a quantity of air by multistage compression

The intercooling should be perfect
The compression ratio in each stage should be same
All of the listed here
The work-done in each stage should be same

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Compressors, Gas Turbines and Jet Engines
Pressure ratio in gas turbines is the ratio of

Compressor pressure ratio
Highest pressure to exhaust pressure
Pressures across the turbine
Inlet pressure to exhaust pressure

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Compressors, Gas Turbines and Jet Engines
A closed gas turbine in which fuel is burnt directly in the air is not possible because of

Paucity of O2
Increasing gas temperature
High specific volume
High friction losses

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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
Axial
Reciprocating

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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