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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Sulphur content of fuels is very important to the plant operators because it

Promotes complete combustion
Retards electric precipitation
Has highly corrosive effect
Has high heating value

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known as

Boiler efficiency
Equivalent evaporation
Factor of evaporation
Power of a boiler

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Steam Boilers, Engines, Nozzles and Turbines
A fusible plug is fitted in small boilers in order to

Avoid excessive build up of pressure
Avoid explosion
Control steam dome
Extinguish fire if water level in the boiler falls below alarming limit

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Steam Boilers, Engines, Nozzles and Turbines
The major axis of elliptical manholes on the shell should be provided

Longitudinally
Circumferentially
On dished end
Anywhere

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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
De-Laval turbine is a

Impulse-reaction turbine
Simple reaction turbine
Simple impulse turbine
None of these

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