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Steam Boilers, Engines, Nozzles and Turbines

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

260 kW
302 kW
282 kW
296 kW

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of total useful heat drop to the total isentropic heat drop, is called

Rankine efficiency
Internal efficiency
Stage efficiency
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the workdone on the blades to the energy supplied to the blades, is called

Blading efficiency
Nozzle efficiency
Gross or stage efficiency
Mechanical efficiency

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Steam Boilers, Engines, Nozzles and Turbines
In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is _________ the relative velocity of steam at inlet tip of the blade.

Less than
Equal to
Greater than
None of these

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Steam Boilers, Engines, Nozzles and Turbines
100% efficiency of a thermal cycle cannot be achieved because of

It is not possible to achieve 0°K temperature
Non availability of ideal substance
Leakage
Frictional losses

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Steam Boilers, Engines, Nozzles and Turbines
Locomotive boiler is of the following type

All of the listed here
Horizontal
Internally fired
Multi tubular

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