單項選擇題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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1.單項選擇題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

2.單項選擇題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

3.單項選擇題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

4.單項選擇題Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?()

A.Carbon particles
B.Lube oil
C.Gasoline
D.Diesel fuel

5.單項選擇題Which of the following problems will occur if a disk-type centrifugal lube oil purifier is not properly primed prior to admitting oil flow to the bowl?()

A.Contamination of the lube oil by emulsification will result
B.The lube oil will not be subjected to the proper centrifugal force
C.The lube oil will overheat and flash
D.Oil will discharge from the heavy phase discharge port and be wasted