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Lubricating oil should be changed on a heavy duty diesel engine when ______．
A.It gets dark in color
B.A sample rubbed between fingers feels thin
C.It has been in use for a specified interval
D.It no longer supports combustion
参考答案
更多 “ Lubricating oil should be changed on a heavy duty diesel engine when ______．A.It gets dark in colorB.A sample rubbed between fingers feels thinC.It has been in use for a specified intervalD.It no longer supports combustion ” 相关考题
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单选题What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）A
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单选题What is one effect of running a diesel engine at too cool a temperature? （）A
Buildup of sludge in the lubricating systemB
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Severe heat stresses on mechanical partsD
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单选题There will usually be summaries or daily account tables for heavy oil, diesel oil, lubricating oil, and fresh water, which will be compiled（）A
at the beginning of every watchB
at the beginning of the first watch every dayC
at the completion of every watchD
at noon every day
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单选题Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.A
overspeed tripB
audible/visual alarmC
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单选题If the detergent type lubricating oil being used in a diesel engine is black, the oil （）A
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单选题On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.A
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单选题Lubricating oil should be changed on a heavy duty diesel engine when（）.A
it gets dark in colorB
a sample rubbed between fingers feels thinC
it has been in use for a specified intervalD
it no longer supports combustion
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单选题The oil lubricating diesel engine cylinders usually contain additives formulated to impart a high degree of alkalinity to （） the acid conditions.A
invadeB
provideC
detergentD
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单选题Engine coolant accumulating in the diesel engine lubricating oil can result from a （）A
low oil pressureB
high coolant pressureC
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increasing cooling water flowB
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单选题Lubricating oil used in a diesel engine serves to（）A
reduce the wear of bearing surfacesB
cool the bearing surfacesC
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all of the above
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单选题How often should the lubricating oil of a diesel engine be changed?（）A
After every tripB
Every 4000 hoursC
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单选题When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should（）A
increase the starting air pressureB
use a higher than normal cranking speedC
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单选题When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）A
The diesel oil must never be allowed to mix with the heavy fuelB
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The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valveD
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单选题The heavy-duty lubricating oil with chemical has been widely introduced in recent years（）A
additivesB
behaviorC
coolantD
desiccant
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