Question 950 Deck General

70% to pass

You are planning to use a crude oil washing system. What precaution must be taken with the source tank for the washing machines?

A The oil in the source tank must be sampled for compatibility.
B The inert gas system must lower the oxygen content in the source tank to a maximum of 12%.
C At least one meter must be decanted from the source tank.
D The source tank must have been crude oil washed at least once in the past 150 days.
AI Explanation

The correct answer is C) At least one meter must be decanted from the source tank. The reasoning behind this is that when using a crude oil washing system, the source tank must be decanted by at least one meter to ensure that any accumulated sediment or sludge at the bottom of the tank is not drawn into the washing machines. This is a precautionary measure to prevent any contamination or damage to the washing system. The other options are incorrect because: A) Sampling for compatibility is not a specific requirement for the source tank, B) Lowering the oxygen content is not a requirement for the source tank, and D) The source tank's previous crude oil washing history is not a relevant factor in this situation.

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