单项选择题
A.oil has a tendency to emulsify in the bowl
B.purifier will act as a clarifier at the discharge ring
C.oil will be lost through the water discharge ports
D.oil solids will be deposited only at the intermediate top disk
单项选择题 A centrifugal fuel oil purifier should be shut down if （）
单项选择题 If fuel oil were being discharged from the waster outlet of a fuel oil disk type centrifuge, operated as separator, you should（）
单项选择题 One engine manufacturer recommends heavy fuel oil should not be heated above 80℃ to 95℃ (176 ℉ TO 203℉) before purificationThis upper limit should be observed to ensure against（）