Which of the following is a characteristic that helps distinguish fans from blowers?
A) Fans always require more horsepower to move the same volume of air as a blower.
B) Fans are able to perform better than blowers when the resistance to airflow is high.
C) The air flow is normally parallel to the shaft of a blower.
D) The air flow is normally parallel to the shaft of a fan.
Answer: D
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