Steam Boilers, Engines, Nozzles and Turbines
The flow of steam is supersonic

At the throat of the nozzle
At the entrance to the nozzle
In the convergent portion of the nozzle
In the divergent portion of the nozzle

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Steam Boilers, Engines, Nozzles and Turbines
Spontaneous combustion is a phenomenon in which

All the fuel burns instantaneously producing high energy release
Fuel burns with less air
Coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal
Explosion in furnace

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Steam Boilers, Engines, Nozzles and Turbines
The diagram efficiency is the ratio of

None of these
Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
Workdone on the blades to the energy supplied to the blades
Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam

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