单项选择题
Electric generators can be protected against overload（）.
A.With switches
B.With a governor on the engine
C.With fuses or circuit breakers
D.By using heavy wire
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相关考题
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单项选择题
Deadweight，which is the cargo carrying capacity of a vessel in tons，is determined by（）.
A.Loaded displacement minus light displacement
B.Gross tonnage minus net tonnage
C.Loaded displacement minus net tonnage
D.Light displacement minus the weight of the vessel -
单项选择题
A well in the uppermost deck of a shelter deck vessel which has only a temporary means of closing for the purpose of gaining an exemption from tonnage measurement is called a（n）（）.
A.Exemption space
B.Tonnage deck
C.Cofferdam
D.Tonnage opening -
单项选择题
A tackle by which the outer end of a boom is raised and lowered is the topping（）.
A.Boom
B.Lift
C.Raise
D.Tackle
