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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.

Stop valve
Safety valve
Blow off cock
Fusible plug

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Steam Boilers, Engines, Nozzles and Turbines
In a nozzle, whole frictional loss is assumed to occur between

Inlet and outlet
All of these
Inlet and throat
Throat and exit

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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 remains constant
Velocity decreases
Pressure remains constant
Velocity increases

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Steam Boilers, Engines, Nozzles and Turbines
For combustion of a fuel, following is essential

Correct fuel air ratio
Proper ignition temperature
O₂ to support combustion
All the three above

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Steam Boilers, Engines, Nozzles and Turbines
Fire tube boilers are those in which

Flue gases pass through tubes and water around it
Water passes through the tubes and flue gases around it
Tubes are laid vertically
Forced circulation takes place

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Steam Boilers, Engines, Nozzles and Turbines
The turbine blades are

Straight
Circular
None of these
Curved

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