Q. A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is knwon as

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Q. In a fire tube boiler, the water is contained inside the tubes which are surrounded by flames and hot gases from outside.

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Q. Steam engines are called external combustion engines.

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Q. The diagram factor is the ratio of the

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Q. By compounding the expansion of steam in two or more cylinders, the length of stroke

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Q. The velocity of flue gases (V) through the chimney under a static draught of(H') metres is given by

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Q. A good steam boiler is one which produces maximum quantity of steam with the given fuel

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Q. Cut-off ratio is the ratio of

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Q. The relative efficiency is defined as the

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Q. Benson boiler is a __________ water tube steam boiler using forced circulation of water.

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Q. Lancashire boiler has __________ internal flue tubes.

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Q. Locomotive boiler is a __________ boiler.

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Q. When steam after doing work in the cylinder passes into a condenser, the engine is said to be a

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Q. Lancashire boiler is

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Q. The diameter of a cylindrical shell of a Scotch marine boiler varies from

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Q. The missing quantity per stroke is equal to

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Q. In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is __________ the condenser pressure.

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Q. A compound steam engine requires a heavier flywheel than simple steam engines.

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Q. For the same diameter and thickness of tube, a water tube boiler has __________ heating surface as compared to fire tube boiler.

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Q. Throttle governing of steam engines is a method of controlling the engine output by varying

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