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

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

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Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation of a boiler is a measure to compare

Any type of boilers operating under any conditions
The given boiler with the model
Two different makes of boilers operating under the same operating conditions
The two different boilers of the same make

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Steam Boilers, Engines, Nozzles and Turbines
The main object of a boiler trial is

To determine the thermal efficiency of the boiler when working at a definite pressure
All of these
To prepare heat balance sheet for the boiler
To determine the generating capacity of the boiler

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