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    Question

    Air coolers are more suitable for –

    A hot and humid climate Correct Answer Incorrect Answer
    B hot and dry climate Correct Answer Incorrect Answer
    C cool and humid climate Correct Answer Incorrect Answer
    D cool and dry climate Correct Answer Incorrect Answer

    Solution

    Anaircoolerworksonthesimple principle of evaporation. It does not yield good results when humidity is high. On the contrary, the temperature of dry air can be dropped significantly through the phase transition of liquidwatertowatervapor(evaporation),which  can cool air using much less energy than refrigeration.

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