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
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相关考题
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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 -
单项选择题
Puncture leaks in the lower tubes or bottom of an inflatable liferaft should FIRST be stopped by using（）.
A.sealing clamps
B.repair tape
C.a tube patch
D.sail twine and vulcanizing kit -
单项选择题
Point out which one of the following items is not in the charge of Chief Officer in repairing operation（）.
A.hull cleaning
B.derusting and painting
C.the maintenance of boiler
D.docking and undocking
