单项选择题

Holes in the bulwark，which allow deck water to drain into the sea，are（）.

A.doggers
B.fidleys
C.freeing ports
D.swash ports

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单项选择题

Gross tonnage indicates the vessel’s（）.

A.displacement in metric tons
B.total weight including cargo
C.volume in cubic feet
D.the volume of the enclosed space

单项选择题

Grinding to eliminate shallow surface defects should be done（）.

A.parallel to the longitudinal direction of the chain
B.perpendicular to the direction of the anchor chain
C.diagonally across the link of the anchor chain
D.around the circumference of the chain link

单项选择题

Fuel oil tank vents are fitted with a screen which will stop（）.

A.oil from flowing out of the tank vent
B.air from entering the tank vent
C.vapors from leaving the tank vent
D.flames on deck from entering the tank vent