Question 85Safety & Environmental - Assistant Engineer

The correct answer is C) fire main. Portable oil tank cleaning machines are usually provided with a water supply from the fire main system. The fire main is a network of piping and pumps that supplies water for firefighting purposes on board a vessel. This pressurized water supply is readily available and can be easily accessed to provide the necessary water for the oil tank cleaning machine. The other options are incorrect because: A) the "mucking supply system" is not a standard term and does not refer to a water supply, B) the potable water supply is for drinking and washing purposes, not for industrial uses like tank cleaning, and D) the inert gas scrubber is a separate system used for treating exhaust gases, not providing water.