Furnace Technology
Which of the following is not an additive for flue gases from furnace to reduce its dew-point?

Ammonia
Alkaline powders
None of these
Fine dolomite

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Furnace Technology
Turn down ratio of a burner

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

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