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Oil water separators are used to ensure that ships don’t discharge oil when （） bilge water.
A . to pump off
B . being pumped
C . pumping out
D . it pumping out
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The vapors given off by heated fuel oil are flammable, explosive, and （）
A . lighter than air
B . heavier than air
C . odorless
D . nontoxic
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Lube oil pumps taking suction from the sump of most small marine engines are usually （）.
A . of the diaphragm type
B . of the centrifugal type
C . of the positive displacement type
D . independently driven by electric motor
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（）are used to ensure that ships don’t discharge oil when pumping out oily water from any oil contaminated space.
A . Boiler
B . Incinerator
C . Oily water separator
D . Sewage treatment unit
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Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce（）.
A . cold corrosion of the nozzles
B . fuel viscosity for better atomization
C . carbon accumulation on the nozzles
D . fuel detonation in the cylinder
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Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to the （）.
A、main bearings
B、connecting rod bearings
C、piston pin bushings
D、all of the above
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When you are transferring fuel oil to the setting tanks, precautions to be observed should include （）
A . plugging gooseneck tank vents to prevent accident overflow
B . maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow line
C . sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fill
D . maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the shi
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The vapors given off by heated fuel oil are heavier than air and are（）.
A . odorless
B . explosive
C . nontoxic
D . visible
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Fuel oil tank vents are fitted with a screen which will stop（）.
A . oil from flowing out of the tank vent
B . air from entering the tank vent
C . vapors from leaving the tank vent
D . flames on deck from entering the tank vent
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With respect to the flow of lubricating oil through a diesel engine, the lube oil coolers are located after filters in order to （）.
A . allow filtration of less viscous oil
B . decrease the pressure drop across the filter
C . improve overall filtration
D . all of the above
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Friction, engine wear and oil consumption in a diesel engine are directly related to the （）.
A . acidity of the oil
B . pour point of the oil
C . flash point of the oil
D . viscosity of the oil
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Two main lubricating oil pumps are usual and are obligatory in （）.
A . container ships
B . bulk carriers
C . passenger ships
D . barge
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Positive displacement, helical gear pumps are well suited for pumping oil because （）
A . stuffing boxes eliminate the leakage problems usually associated with other gear pumps
B . it is not necessary to closely maintain design clearances with this pump
C . they are essentially self-priming and produce a high suction lift
D . these pumps are designed with extreme tooth angled
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In general, the oil mist defectors include a base plate with air blast pumpThe function of air blast pump is to （）crankcase.
A . supply clean air to the measuring compartment of the units for more accuracy
B . generaate the pressure required for the extraction of the oil mist from the
C . generate the pressure required for the extraction of the oil mist from the crankcase
D . supply clean air to the measuring track of the units for more accuracy
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The oil mist detectors continuously（） the crankcase atmosphere, via a pipe system, and move it past a sensitive and accurate opacity measuring track.
A . detract
B . extract
C . pump up
D . pump dow
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When two oil separators are working in series, they should work with （）
A . both as clarifiers
B . first one as clarifiers, second one as purifier
C . both as purifiers
D . first one as purifier, second one as clarifier
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To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of （）.
A . brass
B . copper
C . iron
D . monel metal or stainless steel
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Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.
A . fuel oil vapor at the sludge tank vent
B . unburned fuel vapors in the scavenge air receiver
C . lube oil vapors in the crank case
D . lube oil vapors in the engine room
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The preferred type of pollution control for oil spills on the water is(are) （）.
A . straw
B . booms
C . skimmers
D . chemical dispersant
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Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）
A . Splash
B . Gravity
C . Pressure
D . Bypa
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The following options are all the functions of lubricating oil except（）
A . removing heat and deposits
B . neutralizing acidic products
C . lubricating
D . improving combustion efficiency
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Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organisms which are capable of metabolising oil compounds except（）.
A . bacteria
B . moulds
C . yeasts
D . seal
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Emissions from coal and oil burning _____________ are blamed mostly.
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You are on a tanker discharging oil．When all of th...
You are on a tanker discharging oil．When all of the oil that the main cargo pumps can handle is pumped out of a tank，the remainder is ______．
A.Stripped out and pumped directly ashore into the mainline as the remaining cargo tanks are pumped out with the main pumps
B.Stripped to one tank and then pumped out with the main pumps
C.Stripped out and pumped directly ashore after all the tanks have been emptied by the main pumps
D.Gravitated to the centers from the wings and pumped out with the main pumps
