Question:
The quantity of air taken by an auxiliary fan should not exceed
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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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Recall the guideline for auxiliary fans.
To maintain adequate ventilation in the main airway, an auxiliary fan should not withdraw excessive air from the main air current.
Step 2: State the permissible limit. The quantity of air taken by an auxiliary fan should not exceed \[ \boxed{\frac{1}{3}} \] of the quantity available in the air current supplying the fan. Hence, \[ \boxed{(B)} \] is the correct answer.
Step 2: State the permissible limit. The quantity of air taken by an auxiliary fan should not exceed \[ \boxed{\frac{1}{3}} \] of the quantity available in the air current supplying the fan. Hence, \[ \boxed{(B)} \] is the correct answer.
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