单项选择题
A.wrought-iron B.aluminum C.high-tensile steel D.mild steel
Repairing damage to the hull at or above the waterline ...
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
Repair of structures on a ship in the vicinity of liqui...
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
Records which must be retained on board after report of...
单项选择题Records which must be retained on board after report of casualty to a vessel include the（）.
A.tour reports B.hull reports C.machinery repair record book D.deck equipment log
