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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The main purpose of reheating in gas turbine is to

Increase power output
Reduce turbine size
Increase speed
Increase temperature

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Compressors, Gas Turbines and Jet Engines
A simple turbojet engine is basically

A propeller system
Chemical rocket engine
Gas turbine engine equipped with a propulsive nozzle and diffuse
Ramjet engine

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Compressors, Gas Turbines and Jet Engines
The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p₁ = Intake pressure of air, p₂ = Inter-cooler pressure, and p₃ = Delivery pressure of air)

p₂ = p₁ × p₂
p₂ = p₁ × p₃
p₂ = p₁/p₃
p₂ = p₃/p₁

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Compressors, Gas Turbines and Jet Engines
The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)

r ɣ-1
1 - r ɣ-1
1 - (1/r) ɣ-1/ɣ
1 - (1/r) ɣ/ɣ-1

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Compressors, Gas Turbines and Jet Engines
The mass of gas turbine per kW developed is about ________ as that of an I.C. engine.

Same
One fourth
One-half
One sixth

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Compressors, Gas Turbines and Jet Engines
The volume of air delivered by the compressor is called

Swept volume
Compressor capacity
Free air delivery
None of the listed here

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