Which is most preferred type of draught system?(a) Chimney draught(b) Fan draught(c) Force draught(d) Balanced draughtThis question was posed to me in semester exam.Origin of the question is Draught System topic in section Steam Generators & Accessories of Energy Engineering

Which is most preferred type of draught system?(a) Chimney draught(b)

1.	Which is most preferred type of draught system?(a) Chimney draught(b) Fan draught(c) Force draught(d) Balanced draughtThis question was posed to me in semester exam.Origin of the question is Draught System topic in section Steam Generators & Accessories of Energy Engineering
Answer» The CORRECT option is (d) Balanced draught The EXPLANATION is: A balanced draught system combines the features of forced draught and induced draught. In case of forced draught, when the furnace doors are OPENED high pressure air rushes outside and even blow out the fire entirely. In case of induced draught, when the furnace doors are opened to atmosphere air enters the furnace and causes IMBALANCE in the draught. This difficulty is overcome by using balanced draught.

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Which is most preferred type of draught system?(a) Chimney draught(b) Fan draught(c) Force draught(d) Balanced draughtThis question was posed to me in semester exam.Origin of the question is Draught System topic in section Steam Generators & Accessories of Energy Engineering

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