Question 1019 Deck General

The correct answer is C) The source tank for the tank cleaning machines must have least one meter decanted from it. The reasoning behind this is that when conducting crude oil washing operations, it is important to prevent the buildup of electrostatic charge in the tanks. One of the ways to do this is to ensure that the source tank for the tank cleaning machines has at least one meter of settled oil decanted from it. This helps to reduce the amount of particulate matter and sludge in the oil, which can contribute to electrostatic buildup. The other answer choices are incorrect because they do not directly address the issue of electrostatic buildup. Reducing the oxygen content in the tanks (option A) and using fixed and portable machines simultaneously (option B) are not specifically required to prevent electrostatic buildup. Option D, regarding the drop setting of the portable machines, is also not directly relevant to the prevention of electrostatic buildup.