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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks

90° to each other
180° to each other
0° to each other
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following varieties of coals is mostly used in steam boilers?

Non-coking bituminous coal
Brown coal
None of the listed here
Peat

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

Transport and dry the coal
Provide air around burners for obtaining optimum combustion
Cool the scanners
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

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Steam Boilers, Engines, Nozzles and Turbines
Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of

Fouling of heat transfer surfaces
Higher effectiveness of boiler
Raising of steam temperature
High calorific value coal being burnt

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Steam Boilers, Engines, Nozzles and Turbines
When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.

None of these
Remain same
Increases
Decreases

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Steam Boilers, Engines, Nozzles and Turbines
The fittings mounted on the boiler for its proper and safe functioning is a

Safety valve
Water level indicator
All of these
Pressure gauge

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