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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
When the nozzle operates with the maximum mass flow, the nozzle is said to be

None of these
Over-damping
Choked
Under-damping

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Steam Boilers, Engines, Nozzles and Turbines
The water tubes in a simple vertical boiler are

Horizontal
Inclined
None of the listed here
Vertical

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Steam Boilers, Engines, Nozzles and Turbines
Benson boiler requires

Two drums
One drum
Three drums
No drum

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Steam Boilers, Engines, Nozzles and Turbines
Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value

1 – moisture content
(1 + moisture content)
1 + moisture content
(1- moisture content)

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Steam Boilers, Engines, Nozzles and Turbines
The heat balance sheet for the boiler shows the

Complete account of heat supplied by 1 kg of dry fuel and the heat consumed
Steam formed by combustion of hydrogen per kg of fuel
Moisture present in the fuel
All of these

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Steam Boilers, Engines, Nozzles and Turbines
Hard coke is used in

Thermal power plant
Cement industry
Domestic use
Blast furnace

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