The correct answer is (d) We dump the content in a drowning tub and remove flumes through air outlet
Easy explanation: In such cases of an emergency the contents of the nitrator is dumped rapidly rapidly into a large volume of water contained in a “drowning tub.” A common accessory for a nitrator is a suction line in the vapour space above the liquid charge to remove the acid fumes and oxides of nitrogen which may be liberated.
