Q. A draught produced by a chimney due to the difference of densities between the hot gases inside the chimney and cold atmospheric air outside it, is called natural draught.

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Q. Which of the following statement is correct ?

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Q. The fire tubes in a Cochran boiler are

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Q. A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly

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Q. The aim of a compound steam engine is

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Q. The average operating pressure of Benson boiler is

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Q. The diameter of Cornish boiler varies from

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Q. Cut-off governing of steam engines is a method of controlling the engine output by varying

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Q. In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

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Q. A safety valve mainly used with locomotive and marine boilers is

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Q. Which of the following boiler is best suited to meet the fluctuating demand of steam ?

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Q. Which of the following statement is correct ?

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Q. The draught produced by a steam jet issuing from a nozzle placed in the ashpit under the fire grate of the furnace is called

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Q. Which of the following statement is wrong ?

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Q. The function of a crosshead is to guide motion of the __________ and to prevent it from bending.

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Q. The cylinder dimensions of a compound engine may be designed on the basis of

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Q. The function of a piston rod is

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Q. A single acting steam engine produces __________ power than that of double acting steam engine.

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Q. The pressure of steam in the engine cylinder at the beginning of the stroke is __________ the boiler pressure.

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Q. The function of a flywheel is

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