Chemical Engineering - Environmental Engineering - Discussion

Discussion Forum : Environmental Engineering - Section 2 (Q.No. 47)
47.
Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
with greater number of blades.
of increased diameter.
both (a) & (b).
neither (a) nor (b).
Answer: Option
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