A.in any emergency or if in any doubt as to what decision or measures to take
B.in the event of any impending action in machinery spaces that may cause reduction in ship’s speed
C.when isolating and bypassing machinery to be worked on
D.co-operating with any engineer in charge of maintenance work
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A.the chief engineer
B.the designated engineer from shipyard
C.the designated duty officer in charge of the engineering watch
D.the designated surveyor from classification society
When deciding the composition of the engineering watch, which may include appropriately qualified ratings, following criteria shall be taken into account（）
Ⅰ.the type of ship
Ⅱ.the type and condition of the machinery
Ⅲ.the safety of life, ship, cargo and port
Ⅳ.the observance of international, national and local regulations
A.Ⅰ+Ⅱ
B.Ⅱ+Ⅲ
C.Ⅱ+Ⅲ+Ⅳ
D.Ⅰ+Ⅱ+Ⅲ+Ⅳ
A.satisfied engineers
B.qualified ratings
C.satisfied chief engineer
D.qualified chief engineer
A.ship-owner’s
B.master’s
C.chief engineer’s
D.manager’s
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（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
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