Question

ii) The source of the irritating vapor is located 3 feet from the face of a flanged rectangular hood opening those measures 18 inches by 24 inches. If a capture velocity of 150 fpm (feet per minute) is necessary to completely remove this vapor from the room, A- what must be the minimum volumetric flow rate, in cfm (cubic feet per minute), to ensure vapor capture? B- If the hood will be unflanged, and if the same hood volumetric flow rate were maintained as obtained in (A), How far from the hood opening could the irritating vapor source now be located and still guarantee that adequate vapor capture would continue to occur?

          ii) The source of the irritating vapor is located 3 feet from the face of a flanged rectangular hood opening those measures 18 inches by 24 inches. If a capture velocity of 150 fpm (feet per minute) is necessary to completely remove this vapor from the room,
A- what must be the minimum volumetric flow rate, in cfm (cubic feet per minute), to ensure vapor capture?
B- If the hood will be unflanged, and if the same hood volumetric flow rate were maintained as obtained in (A), How far from the hood opening could the irritating vapor source now be located and still guarantee that adequate vapor capture would continue to occur?