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

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

   A.Increases

   B.Decreases

   C.Does not effect

   D.Remain same

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

   A.Climatic condition

   B.Temperature of furnace gases

   C.Height of chimney

   D.All of the above

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

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

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