Accidental flooding of the engine room bilges by the bilge main is prevented by( ).

Accidental flooding of the engine room bilges by the bilge main is prevented by( ).

A.stop-check valves installed in the bilge suction manifolds

B.using a positive displacement reciprocating bilge pump

C.installing educators in all bilge rose boxes

D.installing a swing check before each bilge valve

A解析：bilge main:舱底水总管;stop-check valves：截止止回阀译文：在舱底水吸入总管设立截止止回阀可以防止由舱底水总管引起的舱底水泛滥。