Each inert gas system gas main must have an automatic shut down valve at the outlet of the gas production plant. This valve must close automatically upon（）.

单项选择题During loading and discharging operations，in addition to when the cargo tanks have been properly filled，each inert gas system must be capable of maintaining a minimum gas pressure of（）.

A.150 millimeters of water pressure
B.125 millimeters of water pressure
C.100 millimeters of water pressure
D.75 millimeters of water pressure

单项选择题After making the required notification that a large oil spill into the water has occurred，the FIRST action should be to（）.

A.apply straw or sawdust on the oil
B.contain the spread of the oil
C.throw grains of sand into the oil
D.have the vessel move out of the spill area

单项选择题According to the Chemical Data Guide，which reactive group(s) is are not compatible with the products polybutene and o-xylene? （）

A.Nitric acid
B.Amides
C.Alcohols，glycols
D.Phenols，cresols

单项选择题According to the Chemical Data Guide，1，3 - pentadiene possesses which characteristic? （）

A.Colorless liquid，mild aromatic odor
B.Pale yellow liquid，strong odor
C.Colorless liquid，faint odor
D.Straw-colored liquid，sweet-odor

单项选择题According to regulations，access to a cargo pumproom in a tank vessel carrying grades C or D liquid cargo shall be（）.

A.from areas equipped with power ventilation
B.only from enclosed areas free from sources of vapor ignition
C.from the open deck
D.from within the vessel