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Steam Boilers, Engines, Nozzles and Turbines

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

Velocity remains constant
Pressure remains constant
Velocity increases
Velocity decreases

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

Very high pressures
Atmospheric pressures
Very low pressure
Medium pressures

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Steam Boilers, Engines, Nozzles and Turbines
The reheat factor is the ratio of the

Total useful heat drop to the total isentropic heat drop
None of these
Cumulative heat drop to the isentropic heat drop
Isentropic heat drop to the heat supplied

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Steam Boilers, Engines, Nozzles and Turbines
The actual vacuum in a condenser is equal to

Gauge pressure - atmospheric pressure
Barometric pressure + actual pressure
Barometric pressure - actual pressure
Gauge pressure + atmospheric pressure

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Steam Boilers, Engines, Nozzles and Turbines
An economiser _________ the steam raising capacity of a boiler.

Has no effect on
None of these
Decreases
Increases

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Steam Boilers, Engines, Nozzles and Turbines
1 kg.m is equal to

9.81 Joules
102 Joules
427 Joules
None of these

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