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The separation of impurities and water from ______is essential for good combustion of diesel engines.
A.lube oil
B.fuel oil
C.turbine oil
D.grease
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更多 “ The separation of impurities and water from ______is essential for good combustion of diesel engines.A.lube oilB.fuel oilC.turbine oilD.grease ” 相关考题
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Which of the following is true?A.The water in Texas have been reduced by 75%.B.Most industries in the world suffer from water shortagers.C.The underground water in Saudi Arabia might run out in 50 years.D.Good management of water use resulted from the project in the Central Valley.
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Theoretical perfect combustion in a diesel engine yields by-products of_____.A.aldehydes and carbon dioxideB.water vapor and carbon monoxideC.nitrogen and carbon monoxideD.water vapor and carbon dioxide
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When a clarifier is running the impurities and water collect at the bowl _____.A.centerB.peripheryC.inletD.upper parts
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______ is not likely to be a methods of Traffic Separation．A.Separation of opposing streams of traffic by separation zones or linesB.The separation of through traffic from local traffic by provision of inshore traffic zonesC.Division of traffic from several different direction into sectorsD.Control of routing traffic through shipping routes
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Good anchorage may be obtained anywhere，generally mud and sand，in this water area Vessel may have______．A.good dragging groundB.good towing groundC.good holding groundD.good grabbing ground
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Carl Sagan believes that Venus might be colonized from earth because__________.A.it might be possible to change its atmosphere
B.its atmosphere is the same as the earth's
C.there is a good supply of water on Venus
D.the days on Venus are long enough
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The drinking water is contaminated with impurities.A:blackened
B:polluted
C:darkened
D:mixed
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单选题A shallow dish positioned at the normal water level is connected to the（）This enables the blowing down or removal of scum and impurities from the water surface.A
main stern stop valveB
auxiliary steam stop valveC
scum valveD
blow down valve
考题
单选题A high rate of separation between oil and water is favored by （）.A
large size of oil globuleB
low temperatureC
high viscosityD
high flow rate
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单选题What is NOT a function of the steam drum of a marine water-tube boiler（）.A
Receives saturated steam from the generating tubesB
Serves as a reservoir of boiler feed waterC
Holds internal fittings for separation of moisture from steamD
Collects steam exhausted from the turbines
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单选题Which statement concerning the collection of fresh water is FALSE?（）A
Fresh water may be obtained from fishB
lifeboat covers or canopies should be washed with rain before drinking water is collectedC
Fresh water may be collected from condensation inside the life-raftD
Freshwater cannot be produced from standing seawater
考题
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
remove floating impurities from the oily water surface
考题
单选题The removal of （） from lubricating oil will reduce engine wear and possible breakdowns.A
contaminating waterB
contaminated additivesC
contaminated fuelD
contaminating impurities
考题
单选题The emulsion of the oil is mainly caused by （）.A
the solid impurities of large particleB
the solid impurities of fine particleC
the water contentD
both water and solid impurities
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单选题Clean oil is achieved in a clarifier bowl where the impurities and water collect at the bowl （）.A
bottomB
topC
centerD
periphery
考题
单选题The separation of impurities and water from （） is essential for good combustion of diesel engines.A
lube oilB
fuel oilC
turbine oilD
grease
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单选题A centrifuge arranged to separate impurities and small amounts of water from oil is known as （）.A
an oily water separatorB
a purifierC
a centrifugal compressorD
a clarifier
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单选题The principle of separation by which all commercially available oily water separators function is （） differential between oil and water.A
the temperatureB
the viscosityC
the gravityD
the size
考题
单选题（） is not likely to be a methods of Traffic Separation.A
Separation of opposing streams of traffic by separation zones or linesB
The separation of through traffic from local traffic by provision of inshore traffic zonesC
Division of traffic from several different direction into sectorsD
Control of routing traffic through shipping routes
考题
单选题When a clarifier is running the impurities and water collect at the bowl （）.A
centerB
peripheryC
inletD
upper parts
考题
单选题Impurities from the boiler water surface can be removed through the （）.A
safety valveB
blow down valveC
scum valveD
feed check valve
考题
单选题As for turbine oil, contact with water in the form of steam will be inevitable so good （） properties will be essential.A
defrostingB
de-oilingC
demulsifyingD
dehumidifying
考题
单选题Bottom blow valves are installed on auxiliary water-tube boilers to （）A
completely drain the boiler in an emergencyB
prevent sludge from forming in the drumC
remove floating impurities from the boiler water surfaceD
remove settled solids from the water drum
考题
单选题Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinderIf the cooling water temperature from all cylinders begins to rise above normal, you should suspect （）A
increase blow-by in all cylindersB
incomplete combustion in all cylinderC
overloading in all cylindersD
insufficient fuel delivery to all cylinders
考题
单选题The air required for combustion is taken from the engine room through a filter fitted on the turbochargerThis reduces the risk for too and contamination of the combustion air（）A
high temperaturesB
low temperaturesC
wetD
dirty
考题
单选题A vessel using a traffic separation scheme shall so far as practicable（）a traffic separation line or separation zone.A
keep well clearB
keep very farC
keep clear ofD
keep clear from
考题
单选题The expression “separate the wheat from the chaff in the teaching profession” is closest in meaning to ______.A
distinguish better teachers from less capable onesB
differentiate young teachers from old onesC
tell the essential qualities of good teachingD
reevaluate the role of senior teachers
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