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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A safety valve mainly used with locomotive and marine boilers is

Dead weight safety valve
Spring loaded safety valve
High steam and low water safety valve
Lever safety valve

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Steam Boilers, Engines, Nozzles and Turbines
Secondary air is the air used to

Air delivered by induced draft fan
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone
Provide air around burners for obtaining optimum combustion
Transport and dry the coal

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Steam Boilers, Engines, Nozzles and Turbines
The safety valve at superheater as compared to drum safety valve setting is set at

Any value
Higher value
Lower value
Same value

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Steam Boilers, Engines, Nozzles and Turbines
Desecration of feed water is carried out because it reduces

Corrosion caused by oxygen
pH value of water
Cavitation of boiler feed pumps
Heat transfer coefficient

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called

Condenser efficiency
Boiler efficiency
Nozzle efficiency
Vacuum efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following boilers is best suited to meet fluctuating demands?

Babcock and Wilcox
Lancashire
Locomotive
Cochran

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