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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

296 kW
282 kW
302 kW
260 kW

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Steam Boilers, Engines, Nozzles and Turbines
A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as

Steam boiler
Economiser
Steam preheater
Steam condenser

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler is used where working pressure and power required are

None of these
Low
High
Moderate

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Steam Boilers, Engines, Nozzles and Turbines
The safety valve on boiler drum compared to safety valve on superheater is set at

Higher value
Lower value
Same value
Lower/higher depending on steam flow

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Steam Boilers, Engines, Nozzles and Turbines
The overall efficiency of thermal power plant is

Boiler efficiency, turbine efficiency, generator efficiency
All the three above plus gas cycle efficiency
Regenerative cycle efficiency
Carnot cycle efficiency

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Steam Boilers, Engines, Nozzles and Turbines
On Millier chart, the constant pressure lines

Are equally spaced throughout
Diverge from left to right
First rise up and then fall
Diverge from right to left

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