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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The ratio of total useful heat drop to the total isentropic heat drop, is called

Rankine efficiency
Stage efficiency
None of these
Internal efficiency

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Steam Boilers, Engines, Nozzles and Turbines
When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by

None of these
(h + hf1)/2257
(h - hf1)/2257
(h × hf1)/2257

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The draught in locomotive boilers is produced by a

Chimney
Steam jet
None of these
Centrifugal fan

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Steam Boilers, Engines, Nozzles and Turbines
Natural water circulation, by convection in water tube boilers, with increase in pressure of boiler

Increases
Decreases
First increases and then decreases
Remain unaffected

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Steam Boilers, Engines, Nozzles and Turbines
When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as

Internally fired boiler
Natural circulation boiler
Forced circulation boiler
Externally fired boiler

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