In an oily water separator the oil will travel _____ to the oil collecting spaces.

A:upwards B:downwards C:outwards D:forwards

The most suitable pump for oily water separator feed duties is _____.

A:a reciprocating pump B:a vane pump C:a centrifugal pump D:a triple screw pump

The ____pump is usually used as the bilge feed pump to an oily water separator.

A:turbine B:screw C:vane D:ejector

The pressure difference of the gauge on the oily water separator increases greatly, the reason is____.

A:the filter is clogged B:bilge suction value is clogged C:suction value and discharge value of the pump do not open fully D:screw pump is worn seriously and volumetric efficiency is decreased

Before the oily water separator put into operation, it should be ____.

A:filled with bilge water B:filled with oil C:filled with clean water D:be emptied

If found oil when we open low oil level plug of separator, it indicates ____.

A:the separator is overload B:the monitor equipment of separator fails C:the discharge pump of separator can not work D:the temperature of oil water is low

The following measures can be used to improve oily water separator ’s separating effect except ____.

A:overhauling every two year B:working at intervals C:renewing filtration material D:pumping bilge water from different layers respectively

Which of the following is wrong about operation of oily water separator?

A:filled with clean water before operation B:keep air cushion in oil collecting space during running C:check oil level during running D:clean inner separator with low pressure stream

____ can cause oil flow from water outlet of a separator.

A:Oil inlet valve opening too quickly B:Oil temperature too high C:Diameter of gravity disc too small D:Viscosity of oil too low

____ can not cause oil flow from water outlet of self-cleaning separator.

A:Oil temperature too high B:Diameter of gravity disc too large C:Oil temperature too low D:High level tank out of water