Compressors,Gas Dynamics and Gas Turbines - Mechanical Engineering Questions and Answers

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A closed cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.

same

lower

higher

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Gas turbine as compared to steam turbine

requires less space for installation

has compressor and combustion chamber

has less efficiency

all of these

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Intercooling in gas turbines

decreases net output but increases thermal efficiency

increases net output but decreases thermal efficiency

decreases net output and thermal efficiency both

increases net output and thermal efficiency both

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When the temperature of air leaving the intercooler, in a two stage compression with intercooler, is __________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.

equal to

less than

more than

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The actual volume of air delivered by a compressor, When reduced to the normal temperature and pressure conditions is called compressor capacity.

Yes

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The compression ratio in a gas turbine is

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Intercooling in compressors results in saving of power in compressing given volume of air to a given pressure.

Correct

Incorrect

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Only rocket engines can be propelled to space because

they can generate very high thrust

they have high propulsion efficiency

these engines can work on several fuels

they are not air-breathing engines

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The maximum combustion pressure in gas turbine is __________ as compared to I.C. engine.

less