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

Water passes through the tubes and flue gases around it
Work is done during adiabatic expansion
Change in enthalpy
Flue gases pass through tubes and water around it

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Pick up the correct statement as regards Cornish boiler and Lancashire boiler

Cornish has two fire tubes and Lancashire has one
Lancashire has two fire tubes and Cornish has one
Cornish is water tube and Lancashire is fire tube
Cornish is fire tube and Lancashire is water tube

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Steam Boilers, Engines, Nozzles and Turbines
The function of a safety valve is

To measure pressure of steam inside the steam boiler
To indicate the water level inside the boiler to an observer
To blow off steam when the pressure of steam inside the boiler exceeds the working pressure
None of these

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