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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Maximum energy loss in a boiler occurs due to

Unburnt carbon in ash
Flue gases
Incomplete combustion
Ash content

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Steam Boilers, Engines, Nozzles and Turbines
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

Three times
Equal to
Twice
Four times

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of flue tube in a Cornish boiler is _________ that of the shell.

Three-fifth
One-third
One-fourth
Two-fifth

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Steam Boilers, Engines, Nozzles and Turbines
Incomplete combustion can be best judged by

Smoky chimney exit
Excess air in flue gases
Measuring temperature of flue gases at exit of furnace
Measuring carbon monoxide in flue gases

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is required for a steam condensing plant?

Condensate pump
Air extraction pump
All of these
Condenser

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Steam Boilers, Engines, Nozzles and Turbines
The amount of water evaporated in kg per kg of fuel burnt is called

None of these
Evaporative capacity of a boiler
Equivalent evaporation from and at 100° C
Boiler efficiency

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