Steam Boilers, Engines, Nozzles and Turbines
The heat loss in a boiler takes place in the form of

Moisture present in fuel and steam formed by combustion of hydrogen in fuel
All of these
Heat carried away by flue gases
Heat carried away by ash

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

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

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Steam Boilers, Engines, Nozzles and Turbines
In an ideal impulse turbine, the

Absolute velocity at the inlet of moving blade is equal to that at the outlet
Relative velocity at the inlet of the moving blade is equal to that at the outlet
Whirl velocity at inlet is equal to that at the outlet
Axial velocity at inlet is equal to that at the outlet

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