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[主观题]
A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must
have a cylinder oil having a ________.
A.low TBN value
B.high alkaline reserve
C.low flash point
D.high pour point
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A.low TBN value
B.high alkaline reserve
C.low flash point
D.high pour point
第1题
A.ventilated and tagged
B.ventilated and cooled down
C.insulated and encased
D.insulated and warmed up
第2题
A.chemical ignition
B.spontaneous combustion
C.chemical combustion
D.radiation ignition
第3题
A.The smoother/the greater
B.Smoother/less
C.The rougher/ the greater
D.rougher/greater
第4题
A.propeller hub
B.lignum vitae
C.shaft packing
D.labyrinth seal
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