At constant efficiency, the horse power of a fan is:

1.	At constant efficiency, the horse power of a fan is:
A.	Proportional to rpm
B.	Proportional to \[{{(rpm)}^{2}}\]
C.	Proportional to \[{{(rpm)}^{3}}\]
D.	A polynomial function of rpm
Answer» C. Proportional to \[{{(rpm)}^{3}}\]

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At constant efficiency, the horse power of a fan is:

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