Question 84Safety & Environmental - Assistant Engineer70% to pass
When using portable tank cleaning machines, the hoses may be disconnected when _______________.
AI Explanation
The correct answer is D) the machine is not inside the tank.
When using portable tank cleaning machines, the hoses should only be disconnected when the machine is not inside the tank. This is because disconnecting the hoses while the machine is still inside the tank could allow residual pressure or contents to be released, which could be hazardous for the operator. The other options (A, B, and C) are incorrect because they do not represent the safe practice of disconnecting hoses only when the machine is fully outside the tank.
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