单项选择题
Which statement is TRUE concerning gasoline vapors on board a vessel（）.
A.They are heavier than air and will settle in the lowest part of the vessel
B.They are lighter than air and will settle in the highest part of the vessel
C.They should be vented into the engine to improve combustion
D.They should be vented into the wheelhouse
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相关考题
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单项选择题
Which statement is TRUE concerning fuel vapors on a vessel（）.
A.Fuel vapors gather in the lowest portions of the vessel
B.Fuel vapors can only be ignited by an open flame
C.Vent outlets should be located above the level of the carburetor air intake
D.None of the above -
单项选择题
Which is a part of a vessel’s standing rigging（）.
A.Sheet
B.Backstay
C.Topping lift
D.Downhaul -
单项选择题
What term describes a three-strand rope laid up right- or left-handed（）.
A.Soft-laid
B.Hard-laid
C.Sennet-laid
D.Hawser-laid
