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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The bituminous coal is no caking if its carbon content is

90-95%
85-90%
78-81%
81-85%

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Steam Boilers, Engines, Nozzles and Turbines
The expansion of steam, as it flows over the blades in reaction turbine, represents

Free expansion process
Isentropic process
Throttling process
Isothermal process

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Steam Boilers, Engines, Nozzles and Turbines
The turbine blades are

None of these
Curved
Circular
Straight

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Steam Boilers, Engines, Nozzles and Turbines
During polytropic process

Work is done
All of these
Heat transfer takes place across cylinder walls
Steam may be wet, dry or superheated after expansion

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Steam Boilers, Engines, Nozzles and Turbines
Green coal, in order to be burnt, must be

Burnt in excess air
Heated to its ignition point
Burnt as powder
Heated sufficiently

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Steam Boilers, Engines, Nozzles and Turbines
The evaporation of 15.653 kg of water per hour from and at 100°C is called

One boiler h.p.
Equivalent evaporation
Factor of evaporation
Evaporative capacity

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