单项选择题
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
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相关考题
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单项选择题
What can cause a lack of oxygen in a chain locker（）．
A.Absorption
B.Osmosis
C.Evaporation
D.Oxidation -
单项选择题
Tonnage openings must be closed by means of（）.
A.Press board
B.Steel hatch boards
C.Steel plates
D.Wooden hatch boards -
单项选择题
The Vessel’s cargo holds are properly fitted with（）in way of hatches.
A.Floor-ceiling
B.Battens
C.Covers
D.Hard-wood boards
