Question 971 Deck General

The correct answer is D) Reduce the pumping rate. When the pressure in a tank being discharged starts to drop below the allowable limit, the appropriate action is to reduce the pumping rate. This is because the pumping rate directly affects the pressure within the tank. Reducing the pumping rate will allow the inert gas system to maintain the necessary pressure in the tank, preventing the pressure from dropping below the allowable limit. The other options are incorrect because: A) Adding another IG fan may increase gas flow, but it does not directly address the dropping pressure; B) Opening the tank isolation valve fully could potentially cause the pressure to drop further; and C) Opening the pressure control valve may increase the pressure, but it does not address the root cause of the dropping pressure.