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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The propulsive power of the rocket is (where v₁ = Jet velocity, and v₂ = Aircraft velocity)

(v₁² -v₂²)/g
(v₁² -v₂²)/2g
(v₁ - v₂)²/2g
(v₁ - v₂)²/g

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Compressors, Gas Turbines and Jet Engines
The blades of gas turbine are made of

Carbon steel
Stainless steel
High nickel alloy
High alloy steel

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Compressors, Gas Turbines and Jet Engines
Standard air is the air at ___ and relative humidity of 36 percent.

1 bar and 40°C
0.1 bar and 20°C
1 bar and 20°C
0.1 bar and 40°C

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Compressors, Gas Turbines and Jet Engines
The work ratio of a gas turbine plant is defined as the ratio of

Net work output and heat supplied
Actual heat drop and isentropic heat drop
Net work output and work done by turbine
Net work output and isentropic heat drop

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Compressors, Gas Turbines and Jet Engines
After-cooler is used to

Decrease the delivery temperature for ease in handling
Cool the air
Cause moisture and oil vapour to drop out
Reduce volume

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Compressors, Gas Turbines and Jet Engines
The pressure and temperature conditions of air at the suction of compressor are

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

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