Main propulsion engine lube oil sumps should be constructed （）<br>A:so as to never be integral lube<br>B:with a sloped bottom<br>C:only of nonferrous, noncorrosive metals<br>D:with drain/return lines terminating just above or at the designed normal level

Main propulsion engine lube oil sumps should be constructed （）
A:so as to never be integral lube
B:with a sloped bottom
C:only of nonferrous, noncorrosive metals
D:with drain/return lines terminating just above or at the designed normal level

出自：海船船员证

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