Furnace Technology
Power required in case of forced draught as compared to induced draught (for the same draught produced) is

Less
Same
More
Either more or less; depends on the flue gas density Answer: Option B

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Furnace Technology
Turn down ratio of a burner

Is the ratio of maximum to minimum permissible heat input rates
Is normally much more for a continuous furnace as compared to a batch furnace
Should be 1:1 for a batch type furnace.
Should be as low as possible i.e., 1 : 2

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