單項(xiàng)選擇題What type of stern tube bearing has the least friction().

A.Oil-lubricated bearings
B.Lignum vitae
C.Hard rubber
D.Bronze bushings


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1.單項(xiàng)選擇題What is a cofferdam().

A.Tube fitted to an ullage hole
B.Area the product is loaded into
C.Void or empty space separating two tanks
D.Opening in the deck used for cleaning a tank

2.單項(xiàng)選擇題What can cause a lack of oxygen in a chain locker().

A.Absorption
B.Osmosis
C.Evaporation
D.Oxidation

3.單項(xiàng)選擇題Tonnage openings must be closed by means of().

A.Press board
B.Steel hatch boards
C.Steel plates
D.Wooden hatch boards

4.單項(xiàng)選擇題The Vessel’s cargo holds are properly fitted with()in way of hatches.

A.Floor-ceiling
B.Battens
C.Covers
D.Hard-wood boards

5.單項(xiàng)選擇題The strake on each side of the keel is called a().

A.Sheer strake
B.Gatewood strake
C.Insulation strake
D.Garboard strake