Steam boiler | Steam boiler Objective Type Questions and answers


36. The efficiency of the plant.....with the mechanical draught


   A.Increases

   B.Decreases

   C.Remain constant

   D.None of the above


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A.Increases

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37. The mechanical draught......the amount of smoke


   A.Increases

   B.Decreases

   C.Does not effect

   D.Remain same


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B.Decreses

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38. The chimney draught varies with........


   A.Climatic condition

   B.Temperature of furnace gases

   C.Height of chimney

   D.All of the above


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D.All of the above

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39. The draught produced by a steam jet issuing from a nozzle placed in the chimney,is called........


   A.Induced steam jet draught

   B.Forced steam jet draught

   C.Chimney draught

   D.None of the above


✔ View Answer


A.Induced steam jet draught

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35. The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught.Such a draught is called ......


   A.Natural draught

   A.Induced draught

   C.Forced draught

   D.Balanced draught


✔ View Answer


B.Induced draught

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