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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Expanding steam to a very low pressure (high vacuum) in steam engines is

Economical
Desirable
Uneconomical
Essential

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

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

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Steam Boilers, Engines, Nozzles and Turbines
A steam nozzle converts

Potential energy into heat energy of steam
Heat energy of steam into kinetic energy
Heat energy of steam into potential energy
Kinetic energy into heat energy of steam

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Steam Boilers, Engines, Nozzles and Turbines
For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has

Less heating surface
Equal heating surface
More heating surface
Heating surface depends on other parameters

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Steam Boilers, Engines, Nozzles and Turbines
Water tube boilers are

Externally fired
None of these
Internally as well as externally fired
Internally fired

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

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

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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