too little seal water
improper gravity disc
oil discharging pump not working very well
low water level of the working water
第1题：
overhauling every two year
working at intervals
renewing filtration material
pumping bilge water from different layers respectively
第2题：
to repair
to be repaired
repairing
being repaired
第3题：
The requirement to carry an Oil Record Book does not apply to a ship that ______.
A.is not equipped to discharge overboard any oil or oily mixture
B.is on an international voyage to a country that is a party to MARPOL
C.has an International Oil Pollution Prevention Certificate
D.has an oily water separator of sufficient capacity for the oil wastes generated
第4题：
has learnt
have learnt
learn
are learning
第5题：
a separator
oil
water
an oil collecting space
第6题：
working at intervals and properly heating
warming up to 70℃, increase water supply flow
improving impulse of water supply
reducing water supply flow
第7题：
filter
hole
pollution
content
第8题：
did work
would work well
didnt work
wouldnt work
第9题：
sliding bowl bottom
gravity disc
separating disc
scum valve
第10题：
filled with clean water before operation
keep air cushion in oil collecting space during running
check oil level during running
clean inner separator with low pressure stream