单项选择题
On the all-purpose nozzle，the position of the valve when the handle is all the way forward is（）.
A.shut
B.fog
C.solid stream
D.spray
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相关考题
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单项选择题
On a vessel carrying grades A，B，C or D cargoes，enclosed spaces where sources of vapor ignition are normally present shall NOT be segregated from cargo tanks by（）.
A.cofferdams
B.galleys
C.pump rooms
D.tanks used to carry liquids having a flash point of 150°F or above -
单项选择题
Oil may NOT be transferred unless（）.
A.there are two certificated tankermen on each vessel
B.the vessel is equipped with constant-tension winches
C.discharge containment equipment (i.e. drip pans) are in place
D.All of the above -
单项选择题
Of the following，the most important consideration for a tanker is（）.
A.GM
B.the vertical center of gravity
C.the longitudinal center of gravity
D.the stress on the hull
