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Compressors, Gas Turbines & Jet Engines MCQ Question with Answer

Compressors, Gas Turbines & Jet Engines MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 57
There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would

Remain same
Decrease
Increase
None of the above
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Question No : 58
The compressor capacity is defined as the

Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
Volume of air delivered by the compressor
Volume of air sucked by the compressor during its suction stroke
None of the above
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Question No : 59
Which of the following statement is correct relating to rocket engines?

The combustion chamber in a rocket engine is directly analogous to the reservoir of a supersonic wind tunnel
The stagnation conditions exist at the combustion chamber
The exit velocities of exhaust gases are much higher than those in jet engine
All of the above
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Question No : 60
Rotary compressors are suitable for

Large discharge at high pressure
Low discharge at high pressure
Large discharge at low pressure
Low discharge at low pressure
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Question No : 61
A centrifugal compressor works on the principle of

Conversion of pressure energy into kinetic energy
Conversion of kinetic energy into pressure energy
Centripetal action
Generating pressure directly
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Question No : 62
The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is

Low
High
Same
Low/high depending on make and type
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Question No : 63
The pressure and temperature conditions of air at the suction of compressor are

Atmospheric
Slightly more than atmospheric
Slightly less than atmospheric
Pressure slightly less than atmospheric and temperature slightly more than atmospheric
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