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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In jet engines, paraffin is usually used as the fuel because of its

Both (A) and (C) above
Low freezing point
Ease of atomisation
High calorific value

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Compressors, Gas Turbines and Jet Engines
The maximum propulsion efficiency of a turbojet is attained at around following speed

2400 km/hr
1700 km/hr
1050 km/hr
550 km/hr

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Compressors, Gas Turbines and Jet Engines
More than one stage will be preferred for reciprocating compressor if the delivery pressure is more than

10 kg/cm²
14.7 kg/cm²
6 kg/cm²
2 kg/cm²

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Compressors, Gas Turbines and Jet Engines
During peak load periods, the best method of controlling compressors is

Constant speed unloader
Start-stop motor
Relief valve
Variable speed

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Compressors, Gas Turbines and Jet Engines
The compressed air may be used

For operating pneumatic drills
In gas turbine plants
All of the listed here
In starting and supercharging of I.C. engines

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Compressors, Gas Turbines and Jet Engines
The ratio of isentropic work to Euler work is known as

Slip factor
Polytropic reaction
Pressure coefficient
Work coefficient

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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