Q668
The head characteristic of the forward blade centrifugal fan at first with increasing capacity until it flattens, then raising trend before starting to fall again. This indicates the lower loss of head at low capacity which is mainly due to
A.
Large fan speed
B.
Large number of blade which help recirculation of air
AnswerC.
Small number of blade which help recirculation of air
D.
None
Answer: Option B
Solution
Answer: Option B
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