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单选题
The resistance to the movement of the globule in oily water mixture depends on its size and the （） of the fluid.
A
pressure
B
velocity
C
gravity
D
viscosity
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单选题What describes a flood current（）.A
Horizontal movement of the water toward the land after high tideB
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sliding bowl bottomB
gravity discC
bowlD
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单选题Upon arrival at a port, a vessel is not allowed （） her ballast water, tanker washings or bilge water and other oily water at will.A
to dischargeB
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holding its slops onboard until they can be pumped into the city sewer systemB
circulating them through the lube oil purifier to remove water and debrisC
holding its slops onboard until they can be discharged to a shore side reception facilityD
pumping them into a settling tank for separation before pumping the oily water residue overboard
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单选题Bottom blow valves are installed on auxiliary water-tube boilers to （）A
remove suspended and precipitated solids from the boiler waterB
completely drain the boiler in an emergency situationC
prevent hardened scale deposits in the water drumD
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单选题Which of the following is wrong about operation of oily water separator?（）A
filled with clean water before operationB
keep air cushion in oil collecting space during runningC
check oil level during runningD
clean inner separator with low pressure stream
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单选题During inspection of oil and oily mixtures from machinery spaces, which of the following factors should be taken into account by the PSCO? （）A
The quantity of oil residues generatedB
The capacity of sludge and bilge water holding tankC
The capacity of the oily water separatorD
All of the above
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单选题In an oily water separator the oil will travel （） to the oil collecting spaces.A
upwardsB
downwardsC
outwardsD
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单选题Before the oily water is installed on board ships, it must have （）A
IOPPB
type approval certificateC
cargo ship safety equipment certificateD
cargo ship safety certificate
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单选题A centrifuge arranged to separate impurities and small amounts of water from oil is known as （）.A
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the viscosityC
the gravityD
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temperatureB
viscosityC
densityD
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单选题One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）A
seal water supply be cut offB
make up water supply be cut offC
oil outlet valve closed or not open sufficientlyD
the flow rate of oily water is too much
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BoilerB
IncineratorC
Oily water separatorD
Sewage treatment unit
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A 15 ppm oily-water separator is replaced by a 100 ppm oily-water separator
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单选题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 mixtureB
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