The pressure and power requirement of a gas fan at constant speed & capacity varies ____________ the gas density?
Correct answer: D. Directly as
- A. As square of
- B. Inversely as square root of
- C. Inversely as
- D. Directly as
Explanation
At fixed speed and capacity, fan pressure rise is proportional to gas density, and the power requirement is also proportional to density. Therefore increasing density increases both quantities directly.
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