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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The velocity of whirl at outlet for an axial discharge turbine is

Maximum
Minimum
None of these
Zero

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Steam Boilers, Engines, Nozzles and Turbines
Water boils when its vapor pressure

Equals the pressure of water in the container
Equals to atmospheric pressure
Equals 760 mm of mercury
Equals that of the surroundings

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Steam Boilers, Engines, Nozzles and Turbines
An economiser is generally placed between

None of these
Last superheater or reheater and air preheater
Air preheater and chimney
Induced draft fan and forced draft fan

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Steam Boilers, Engines, Nozzles and Turbines
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

Back pressure turbine
Low pressure turbine
Impulse turbine
Pass out turbine

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Steam Boilers, Engines, Nozzles and Turbines
In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the condenser pressure.

Lower than
Higher than
None of these
Equal to

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Steam Boilers, Engines, Nozzles and Turbines
Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of

High calorific value coal being burnt
Raising of steam temperature
Fouling of heat transfer surfaces
Higher effectiveness of boiler

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