_______can cause oil flow from water outlet of the oil purifier.

[单选题]_______can cause oil flow from water outlet of the oil purifier.A．Oil inlet valve opening too quicklyB．Oil temperature little higher than normalC．Diameter of gravity disc too smallD．Viscosity of oil little lower than normal

[单选题]To ensure oil purifier working in normal condition, the interval between two sludge discharging should not exceed_______hours.A．2B．4C．5D．6

[单选题]If there is water in fuel oil, the revolution of the engine will （）.A . decreaseB . increaseC . be dismantledD . be reassembled

[单选题]A．s for turbine oil, contact with water in the form of steam will be inevitable so good______properties will be essentialA．defrostingB．de-oilingC．demulsifyingD．dehumidifying

[单选题]In a complete oil/water separator, more oil will separate out onto the underside of these plates and travel outwards until it is free to rise into the oil collecting space Whats the meaning of "it" in the sentence above?（）A . a separatorB . oilC .

[单选题]Here some oil in the oily water separator, as a result of its lower （）, will separate and rise into the oil collection space.A . temperatureB . viscosityC . densityD . velocity

[单选题]Itseemsoil________fromthispipeforsometime.We’llhavetotakethemachineaparttoputitright.A．)hadleakedB)isleakingC)leakedD)hasbeenleaking

[单选题]The selection of an oil from the （） depends to a great extent on the operating conditions, the design of the engine and the type of fuel to be burned.A . commercially availableB . commerciallyC . commercial availableD . commerce available

[单选题]The removal of （） from lubricating oil will reduce engine wear and possible breakdowns.A . contaminating waterB . contaminated additivesC . contaminated fuelD . contaminating impuritie

[单选题]The lubricating oil is pumped from the drain tank, very often with （） in the suction line.A . a filterB . a strainerC . a magnetic filterD . a fine strainer