When referring to quantity of barite in a P-tank，ullage is the ______．
A. Distance of the barite surface above the tank bottom
B. Percentage of barite in the tank
C. Distance of the barite surface below the tank cover
D. Total weight of barite in UPC（ullages per centimeter）
查看答案
When bunkering is complete，the hoses should be ______．
A. Cleaned internally with a degreaser
B. Washed out with hot soapy water
C. Drained，blanked off，and stored securely
D. Stowed vertically and allowed to drain
When displacement increases，the free surface corrections for slack tanks ______．
A. increase
B. decrease
C. are directly proportional
D. remain unchanged
When a tank is to be gas freed after washing，the concentration of hydrocarbon vapour should be reduced by purging the inerted cargo tank with ______．
A. the oxygen
B. the gas
C. the inert gas
D. the hydrocarbon vapour
What is a requirement for remote manual shutdown stations for internal combustion engine driven cargo pumps on tank barges ________．
A. They must be conspicuously marked
B. They must be located at least 10 feet from the engine
C. There must be at least two such shutdown devices
D. The valve rods shall be fitted with stuffing boxes
微信支付 
支付宝支付