单选题The exhaust pipe must be gas tight throughout its entire length otherwise().Abilge water may enter the exhaust pipeBentry of air may cause vapor lockCcarbon monoxide may enter the interior of the vesselDthe joint gaskets may be blown
单选题
The exhaust pipe must be gas tight throughout its entire length otherwise().
A
bilge water may enter the exhaust pipe
B
entry of air may cause vapor lock
C
carbon monoxide may enter the interior of the vessel
D
the joint gaskets may be blown
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