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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.

More
None of these
Less
Same

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Steam Boilers, Engines, Nozzles and Turbines
Parson's turbine is a

Simple impulse turbine
None of these
Simple reaction turbine
Impulse-reaction turbine

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Steam Boilers, Engines, Nozzles and Turbines
The temperature of flue gases at air heater outlet should be

100°C
Above dew point temperature of flue gases
Below dew point temperature of flue gases
Less than wet bulb temperature of flue gases

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

Internal efficiency
Stage efficiency
Rankine efficiency
Reheat factor

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Steam Boilers, Engines, Nozzles and Turbines
Boiler stays are used to

Provide support for boiler
Prevent flat surfaces under pressure from tearing apart
Take care of failure in compression
Take care of failure in shear

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Steam Boilers, Engines, Nozzles and Turbines
The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by

V = H'/2g
V = 2g H'
V = 2gH'
V = 2g/H'

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