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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

Incomplete combustion
Unburnt carbon in ash
Ash content
Flue gases

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Steam Boilers, Engines, Nozzles and Turbines
The purpose of governing in steam turbines is to

Maintain the speed of the turbine
Reduce the effective heat drop
Completely balance against end thrust
Reheat the steam and improve its quality

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Steam Boilers, Engines, Nozzles and Turbines
In a receiver type compound engine, the high pressure and low pressure cylinders

Have common piston rod
Have separate piston rods
Are set in V-arrangement
Are set at 90°

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as

Power of the boiler
Efficiency of the chimney
Efficiency of the boiler
Efficiency of the fan

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Steam Boilers, Engines, Nozzles and Turbines
A safety valve in a locomotive starts leaking. The leaking medium will be

Wet steam
Dry steam
Super heated steam
Water

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Steam Boilers, Engines, Nozzles and Turbines
The natural draught is produced by

Steam jet
Centrifugal fan
Chimney
Both (A) and (B)

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