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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Size of boiler tubes is specified by

Inside diameter and thickness
Outside diameter and inside diameter
Outside diameter and thickness
Mean diameter and thickness

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Steam Boilers, Engines, Nozzles and Turbines
Presence of moisture in fuel oil would

Aid in proper combustion
Keep the burner tips cool
Because sputtering, possibly extinguishing flame
Clean the nozzles

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of heat equivalent to brake power to the energy supplied in steam is known as

Indicated thermal efficiency
Brake thermal efficiency
Mechanical efficiency
Overall efficiency

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Steam Boilers, Engines, Nozzles and Turbines
The best suited coal for chain or traveling grate stoker boiler is

Coking coal
Pulverized coal
High sulphur coal
Non-coking or free burning coal

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Steam Boilers, Engines, Nozzles and Turbines
In a nozzle, the effect of super-saturation is to

Increase the heat drop
Increase the entropy
Decrease specific volume of steam
Decrease dryness fraction of steam

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Steam Boilers, Engines, Nozzles and Turbines
An economiser is generally placed between

Last superheater or reheater and air preheater
Air preheater and chimney
None of these
Induced draft fan and forced draft fan

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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