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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Maximum delivery pressure is a rotary air compressor is of the order of

6 kg/cm²
10 kg/cm²
25 kg/cm²
16 kg/cm²

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Compressors, Gas Turbines and Jet Engines
Gas turbine cycle with regenerator

Decreases heat loss is exhaust
Increases thermal efficiency
Allows operation at very high altitudes
Allows high compression ratio

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Compressors, Gas Turbines and Jet Engines
A 3 m³/min compressor means that it

Delivers 3 m³/ min of compressed air
Compresses 3 m³/min of standard air
Delivers 3 m³/ min of compressed air at delivery pressure
Compresses 3 m³/ min of free air

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Compressors, Gas Turbines and Jet Engines
Which of the following fuels can be used in turbojet engines?

Liquid hydrogen
Kerosene
Methyl alcohol
High speed diesel oil

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Compressors, Gas Turbines and Jet Engines
The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.

Reduced
Increased
None of these
Zero

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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

Low/high depending on make and type
High
Same
Low

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