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
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相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
The size of the discharge ring used for the efficient operation of a disk type purifier is dependent upon the（）
A.rated capacity of that purifier
B.viscosity of the oil being purified
C.maximum design speed of that purifier
D.specific gravity of the oil being purified
