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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The diameter of superheated tubes in a locomotive boiler is

230 mm
130 mm
31 mm
13 mm

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Steam Boilers, Engines, Nozzles and Turbines
In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

296 kW
282 kW
302 kW
260 kW

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Steam Boilers, Engines, Nozzles and Turbines
In a boiler, the heat is lost

All of these
To dry flue gases
In moisture present in the fuel
To steam formed by combustion of hydrogen per kg of fuel

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Steam Boilers, Engines, Nozzles and Turbines
Water and sediment in fuel oil can be removed by

Heating the oil in the settling tanks
Suspension
Cooling the oil in the settling tanks
Burning the oil

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Steam Boilers, Engines, Nozzles and Turbines
The latent heat of steam with increase of pressure

Increases
Behaves unpredictably
Remain same
Decreases

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Steam Boilers, Engines, Nozzles and Turbines
Natural water circulation, by convection in water tube boilers, with increase in pressure of boiler

Increases
Decreases
First increases and then decreases
Remain unaffected

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