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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is

Equal
More
May be less or more depending on temperature
Less

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of total useful heat drop to the total isentropic heat drop, is called

Rankine efficiency
Stage efficiency
Internal efficiency
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Film boiling occurs at

Very low pressure
Very high pressures
Medium pressures
Atmospheric pressures

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Steam Boilers, Engines, Nozzles and Turbines
The friction in the nozzle __________ exit velocity of steam.

None of these
Increases
Has no effect on
Decreases

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Steam Boilers, Engines, Nozzles and Turbines
Steam turbines may be classified according to

Number of stages
All of these
Direction of steam flow
Mode of steam action

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Steam Boilers, Engines, Nozzles and Turbines
In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

Velocity increases
Pressure remains constant
Velocity decreases
Velocity remains constant

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