Question:
A rectangular face of 2.0 m x 2.5 m dimension is blasted with 20 kg explosive in a 1000 m long drive. One kilogram of explosive produces 2200 cm3 of nitrous fumes. The face is ventilated with a duct, located 10.0 m away from the face, to dilute the fumes. The quantity of air, in m3/s to be circulated for reducing the concentration of nitrous fumes to 5 ppm within a period of 5 minutes, is ____. (round off up to 2 decimals)
[Use the relation, t=2.303 \(\frac{V_m}{Q}\) log \(\frac{q}{v_mc}+\frac{v-v_m}{Q}\) where t=time, Vm=volume of the tunnel over which the mixing of the gases produced at the face, and air delivered by the fan occurs, c = concentration at time, t, V = volume of tunnel, Q = quantity of air flow, q = total volume of nitrous fumes produced]
A rectangular face of 2.0 m x 2.5 m dimension is blasted with 20 kg explosive in a 1000 m long drive. One kilogram of explosive produces 2200 cm3 of nitrous fumes. The face is ventilated with a duct, located 10.0 m away from the face, to dilute the fumes. The quantity of air, in m3/s to be circulated for reducing the concentration of nitrous fumes to 5 ppm within a period of 5 minutes, is ____. (round off up to 2 decimals)
[Use the relation, t=2.303 \(\frac{V_m}{Q}\) log \(\frac{q}{v_mc}+\frac{v-v_m}{Q}\) where t=time, Vm=volume of the tunnel over which the mixing of the gases produced at the face, and air delivered by the fan occurs, c = concentration at time, t, V = volume of tunnel, Q = quantity of air flow, q = total volume of nitrous fumes produced]
[Use the relation, t=2.303 \(\frac{V_m}{Q}\) log \(\frac{q}{v_mc}+\frac{v-v_m}{Q}\) where t=time, Vm=volume of the tunnel over which the mixing of the gases produced at the face, and air delivered by the fan occurs, c = concentration at time, t, V = volume of tunnel, Q = quantity of air flow, q = total volume of nitrous fumes produced]
Updated On: Jul 18, 2024
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Correct Answer: 16.7
Solution and Explanation
The correct answer is: 16.70 or 17.70 (approx)
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