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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called

Velocity factor
Velocity coefficient
None of these
Slip factor

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Compressors, Gas Turbines and Jet Engines
Open cycle gas turbine works on

Rankine cycle
Brayton or Atkinson cycle
Carnot cycle
Ericsson cycle

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

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Compressors, Gas Turbines and Jet Engines
In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into

Discharge nozzle
Back to the compressor
Vacuum
Atmosphere

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Compressors, Gas Turbines and Jet Engines
Isothermal compression efficiency, even when running at high speed, can be approached by using

Cold water spray
Both (A) and (B) above
Multistage compression
Fully insulating the cylinder

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Compressors, Gas Turbines and Jet Engines
The pressure of air at the beginning of the compression stroke is ___ the atmospheric pressure.

More than
Less than
None of the listed here
Equal to

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