An axial flow ventilation fan is being driven by an AC motor.
The fan is operating at 90 percent of rated flow rate with its discharge damper partially closed.
How will the fan motor current change if its discharge damper is fully opened?
A. The motor current will increase in accordance with the centrifugal pump laws.
B. The motor current will increase, but not in accordance with the centrifugal pump laws.
C. The motor current will decrease in accordance with the centrifugal pump laws.
D. The motor current will decrease, but not in accordance with the centrifugal pump laws.
Show Answer
Answer: D
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