The fresh air intake of the inert gas system ______，
A. Prevents the flue gas from falling below 3% content of oxygen
B. Allows the inert gas piping to be used for gas freeing the tanks
C. Opens when there is excessive vacuum on the deck water seal
D. Enables outside air to mix with and cool hot flue gasses
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The number or name of a tank barge shall be ______．
A. Displayed in at least 4 different positions on the barge
B. Carved on a wooden board and attached to the barge's hull
C. Displayed as close to the navigation lights as possible
Displayed at the highest point of the barge's hull such that it can be seen from either side
The tanks should then be ______ immediately after the measurements or cargo samples have been taken．
A. topped up
B. braced
C. tommed down
D. re-pressurized
The fitting at the end of a cargo line in a tank that allows suction to be taken close to
A. Suction end
B. Strainer
C. Bell-mouth
D. Vacuum valve
The blowers of an inert gas generation system aboard a tanker，will be automatically secured if ______．
A. Normal water supply at the water seal is lost
B. The temperature of the inert gas being delivered to the cargo tanks is more than 150℉
C. The cooling water supply to the scrubbers is lost
D. All of the above
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