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單項選擇題

During bunkering, the request for stoppage of pumping shall be made, as a rule, 5 minutes （）.

A.ago
B.before
C.ahead
D.front

單項選擇題

The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the winch drum and should slip only when （）.

A.excessive loads are placed on the winch
B.minimum pull is being exerted by the winch
C.automatic operation of the winch is desired
D.wire is being retrieved at the maximum rate