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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The ratio of the clearance volume to the swept volume is called

Expansion ratio
None of these
Clearance ratio
Cut-off ratio

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Steam Boilers, Engines, Nozzles and Turbines
The water tubes in a simple vertical boiler are

Inclined
Vertical
None of the listed here
Horizontal

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Steam Boilers, Engines, Nozzles and Turbines
Latent heat of dry steam at atmospheric pressure is equal to

427 kcal/ kg
539 kcal/ kg
539 BTU/ lb
100 kcal/ kg

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Steam Boilers, Engines, Nozzles and Turbines
The dry saturated steam at very low pressure, (510 kg/cm²) when throttled to atmosphere will become

Wet
Dry
Remain dry saturated
Superheated

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Steam Boilers, Engines, Nozzles and Turbines
Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value

(1- moisture content)
(1 + moisture content)
1 + moisture content
1 – moisture content

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Steam Boilers, Engines, Nozzles and Turbines
Pulverized fuel is used for

More calorific value
Better burning
Less radiation loss
Medium sized units

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