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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The draught produced by a steam jet issuing from a nozzle placed in the chimney is called

Chimney draught
Induced steam jet draught
None of these
Forced steam jet draught

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in a Scotch marine boiler are

Inclined
Vertical
None of the listed here
Horizontal

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Steam Boilers, Engines, Nozzles and Turbines
The basic purpose of drum in boiler is to

Serve as storage of feed water for water wall
Separate steam from water
Serve as storage of steam
Remove salts from water

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Steam Boilers, Engines, Nozzles and Turbines
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the

Blades are equiangular and frictionless
Blade velocity coefficient is unity
Blades are equiangular
Blade solidity is 0.65

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

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

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Steam Boilers, Engines, Nozzles and Turbines
All steam engines work on

First law of thermodynamics
Second law of thermodynamics
Zeroth law of thermodynamics
None of the listed here

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