Question 1098 Deck General

The correct answer is D) Ventilate the tank to eliminate any electrostatically charged mist. The reason this is the correct answer is that when using portable machines to clean areas of the cargo tank that are shielded from the fixed machines, there is a risk of creating an electrostatically charged mist inside the tank. This mist can be ignited by a spark, posing a serious fire hazard. To mitigate this risk, the tank must be properly ventilated to remove any electrostatically charged mist before continuing the cleaning operation. The other options are incorrect because: A) Attaching the water supply hose after the cleaning head is positioned does not address the electrostatic buildup issue. B) Grounding the fixed machines does not eliminate the risk of electrostatic buildup from the portable machines. C) Ensuring the tanks are not stripped until the final wash is not directly relevant to the electrostatic buildup concern.