单项选择题
When fuel oil is accidentally missed with lube oil which of the following processes can be used to separate them?（）
Ⅰ.filtering
Ⅱ.settling
A.Ⅰ only
B.Ⅱ only
C.either Ⅰ or Ⅱ
D.neither Ⅰ or Ⅱ
相关考题
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单项选择题
A lube oil sample taken from the main engine lube oil system has dark yellow opaque color.This is the result of （）
A.water contamination
B.mixing oils of two widely different viscosities
C.overheating
D.aeration -
单项选择题
When you are transferring fuel oil to the setting tanks, precautions to be observed should include （）
A.plugging gooseneck tank vents to prevent accident overflow
B.maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow line
C.sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fill
D.maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the ship -
单项选择题
Heavy fuel oils generally have an upper average ash content of 0~1% by weight.Which of the following conditions could be expected if the ash content increase above this amount?（）
A.Glazing of the cylinder liners
B.Increase valve wear
C.Excessive oil pumping
D.Increase fuel consumption
