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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

Velocity remains constant
Velocity increases
Velocity decreases
Pressure remains constant

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

None of these
Minimum
Maximum
Zero

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Steam Boilers, Engines, Nozzles and Turbines
The draught in locomotive boilers is produced by a

Chimney
Centrifugal fan
None of these
Steam jet

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Steam Boilers, Engines, Nozzles and Turbines
Hard coke is produced by carburization of coal at

950-1100°C
500-600°C
700-850°C
Atmospheric temperature

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Steam Boilers, Engines, Nozzles and Turbines
Evaporative capacity of boiler is expressed as

kg of steam produced per kg of fuel fifed
Steam pressure produced
kg of steam produced
kg of fuel fired

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Steam Boilers, Engines, Nozzles and Turbines
The crown of the fire box is made hemispherical in order to

Give maximum strength
Withstand pressure inside boiler
Resist intense heat in fire box
Give maximum space

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