A flame screen ______.
A.permits the passage of vapor but not of flame
B.prevents the passage of flammable vapor
C.prevents inert gas from leaving a tank
D.permits vapors to exit but not enter a tank
第1题
A.must utilize magnetic courses
B.must take set and drift into account
C.should be replotted hourly
D.should be started each time the vessel’s position is fixed
第2题
A.increasing the righting moment
B.decreasing the vessel’s displacement
C.increasing the reserve buoyancy
D.shifting the CG (center of gravity) off center
第3题
A.generators
B.oil drums
C.the bridge controls
D.combustible metals
第4题
A.solid materials such as wood or bales of fiber
B.flammable liquids
C.a piece of electrical equipment
D.combustible metallic solid
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