单项选择题

A person may operate an air compressor in which of the following areas on board a tank barge ________．
A.Pumproom
B.Generator room
C.A space adjacent to a cargo tank
D.A space two meters from a cargo valve

A.A.Pumproom
B.Generator
B.A
C.A
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单项选择题
A.B.C.D.
A.
B.
C.
D.
单项选择题
A deck beam does NOT ______．A.act as a beam to support vertical deck loadsB.lessen the longitudinal stiffness of the vesselC.act as a tie to keep the sides of the ship in placeD.act as a web to prevent plate wrinkling due to twisting action on the vessel
A.A.act
B.lessen
C.act
D.act
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