单项选择题

For an upright vessel, draft is the vertical distance between the keel and the （）.

A.waterline
B.freeboard deck
C.Plimsoll mark
D.amidships section

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单项选择题

Which of the following machinery space operations is required to be logged in the Oil Record Book?（）

A.Ballasting or cleaning of fuel oil tanks
B.Shifting suction of main fuel pump to reserve fuel oil tank
C.Changing out sprayer plates to adjust for steam demand
D.Daily inspection of engine room bilges

单项选择题

The distance between the bottom of the hull and the waterline is called （）.

A.tonnage
B.reserve buoyancy
C.draft
D.freeboard

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The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the（）.

A.flash point
B.fire point
C.upper explosive limit
D.lower explosive limit