单项选择题

Small hull leaks can be temporarily repaired by（）.

A.parcelling
B.parbuckling
C.caulking
D.seizing

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单项选择题

Rivets are usually made of（）.

A.wrought-iron
B.aluminum
C.high-tensile steel
D.mild steel

单项选择题

Repairing damage to the hull at or above the waterline reduces the threat of（）.

A.free surface effects
B.capsizing
C.continued progressive flooding
D.wind heel

单项选择题

Repair of structures on a ship in the vicinity of liquid mud handling areas presents what possible hazard?（）

A.Toxic gasses may be present
B.Flammable gasses may be present
C.Liquid muds may flood adjoining spaces
D.An oxygen-deficient atmosphere may be present