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29. For fans, the relation between flow discharge Q and speed N is a) 2 1 Q Q = 2 1 N N b) = 2 2 2 1 N N c) = 3 3 1 N d) none of the above 30 . If inlet and outlet water temperatures of a cooling tower are 40oC and 32oC respectively and atmospheric DBT and WBT are 35 oC and 28 oC respectively then the approach of cooling tower is
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