单项选择题
If the bowl of a disk type centrifugal purifier when operated as a separator is not primed, the（）
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
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相关考题
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单项选择题
A centrifugal fuel oil purifier should be shut down if （）
A.more sealing water is needed
B.the cover clamp needs tightening
C.the purifier has a bad vibration when started
D.water is discharged from the overflow line -
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（）
A.remove the discharge ring
B.re-prime the purifier
C.the centrifuge to its proper speed
D.install an additional discharge ring -
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（）
A.flattening of the bowl neoprene O-rings
B.operation within the explosive rang of the fuel
C.excessive purifier operating pressures
D.excessive oil viscosity
