What is a wet cargo ________．
A liquid cargo carried in the deep tanks
B. A canned or bottled liquid such as beer
C. A cargo that contains hygroscopic moisture
D. A cargo particularly susceptible to damage by moisture
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What is NOT a grade E product ________．
A. Dioctyl-phthalate
B. Gasoline
C. Formic acid
D. Creosote coal tar
What is NOT a function of the scrubber of an inert gas system ________．
A. Cool the inert gas
B. Remove particulate matter like soot
C. Maintain pressure in the tanks
D. Remove chemical impurities
What is NOT a requirement for the safe and effective use of a crude oil washing system ________．
A. Strip all tanks and remove the bottom residue
B. Use an inert gas system while washing tanks
C. Use portable washing machines to reach areas obscured by structural members in the tanks
Debottom the tank used as the source for the tank cleaning machines
To ensure proper seating when closing a valve on a tank，the valve should be ______．
A. Set up as tight as possible by hand
B. Set up tight using a valve wrench
Closed，opened a half turn，and then closed
D. Closed against the stop and the locking pin inserted
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