Question:medium

The quantity of air taken by an auxiliary fan should not exceed

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For auxiliary ventilation, \[ \boxed{ Q_{\text{auxiliary}} \le \frac{1}{3} Q_{\text{main airway}}. } \]

Updated On: Jul 14, 2026

\(\dfrac{1}{2}\) of the quantity in the air current from which the fan takes its supply
\(\dfrac{1}{3}\) of the quantity in the air current from which the fan takes its supply
\(\dfrac{1}{4}\) of the quantity in the air current from which the fan takes its supply
\(\dfrac{1}{5}\) of the quantity in the air current from which the fan takes its supply

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The Correct Option is B

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