网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
The pressure difference before and after the lube oil filter indicates （）the filter should be cleaned.
A
when
B
how
C
where
D
whether
参考答案
参考解析
解析：
暂无解析
更多 “单选题The pressure difference before and after the lube oil filter indicates （）the filter should be cleaned.A whenB howC whereD whether” 相关考题
考题
The pressure differential across a diesel engine lube oil system duplex filter should be checked to ________.A.determine the need for filter cleaningB.measure any change in oil viscosityC.prevent damage to the filterD.determine the need for batch filtration
考题
第二组The only attention that heat exchanger should require is to ensure that the heat transfer surfaces remain substantially clean and the flow passages generally clear of obstruction. Indication that undue fouling is occurring is given by a progressive increase in the temperature difference between the two fluids, over a period of time, usually accompanied by a noticeable rise in pressure loss at a given flow.Fouling on the sea-water side is the most usual cause of deterioration in performance. The method of cleaning the sea water-side surfaces depends on the type of heat exchanger. With shell-and-tube heat exchangers, the removal of the header covers or, m the case of the smaller heat exchangers, the headers themselves, will provide access to the tubes. Obstructions, dirt, scale etc., can then be removed, using the tools provided by the heat exchanger manufacturer. Flushing through with fresh water is recommended before a heat exchanger is returned to service. In some applications, such as piston oil cooling, progressive fouling may take place on the outside of the tubes. Most manufactures recommend a chemical flushing pr6cess to remove this in situ~ without dismantling the heat exchanger.Plate heat exchangers may be cleaned by unclamping the stack of plates and mechanically cleaning the surface of each plate as recommended by the manufacturers. The plate seals may require replacement from time to time and here the manufacturers instructions should be closely followedBy which of the following indication, can we conclude that the lube oil-sea water heat exchanger is unduly fouled?A.the heat exchanger lube oil inlet temperature loweringB.the heat exchanger sea-water outlet pressure riseC.the heat exchanger temperature difference between lube oil and sea water increasingD.the heat exchanger pressure difference between sea water inlet and outlet decreasing
考题
A dirty diesel engine oil filter element can best be detected by ______.A.visual inspection of the elementsB.the pressure drop across the filterC.high lube oil sump temperatureD.decrease in oil viscosity from the filter
考题
控制时间限设定值菜单（）功能是在丙烷机启动过程中旁通润滑油注入温度低信号的时间长度。A、LO OIL INJECTION TEMPERATURE BYPASSB、FILTER DIFFERENTIAL PRESSURE CHANGE-OVER TIMERC、PUMP RUN LIMIT WITHOUT OIL PRESSURE TIMERD、AUTO RESTART AFTER POWER FAILURE TIMER
考题
控制时间限设定值菜单（）功能是在丙烷机断电后到丙烷机重新启动之间的时间间隔。A、LO OIL INJECTION TEMPERATURE BYPASSB、FILTER DIFFERENTIAL PRESSURE CHANGE-OVER TIMERC、PUMP RUN LIMIT WITHOUT OIL PRESSURE TIMERD、AUTO RESTART AFTER POWER FAILURE TIMER
考题
单选题Auxiliary diesel engines can be automatically shut down as a result of （）A
low lube oil temperatureB
low lube oil pressureC
high exhaust temperatureD
high cooling water pressure
考题
单选题A substantial increase pressure could be an indication of a/an （）A
worn cylinder linerB
faulty cylinder relief valveC
excessive lube oil pressureD
excessive scavenge air pressure
考题
单选题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 oilB
decrease the pressure drop across the filterC
improve overall filtrationD
all of the above
考题
单选题A dirty lube oil strainer can result in（）A
crankcaseB
low lube oil temperatureC
excessive oil consumptionD
low bearing oil pressure
考题
单选题A dirty diesel engine oil filter element can best be detected by （）.A
visual inspection of the elementsB
the pressure drop across the filterC
high lube oil sump temperatureD
decrease in oil viscosity from the filter
考题
单选题To determine if the lube oil filter elements need changing, （）.A
open the filter and inspect the elementsB
check the lube oil pump discharge pressureC
check the lube oil header pressureD
check the pressure drop across the filter
考题
单选题The lube oil cooler is located after the lube oil filter in order for （）A
the filter to operate more efficientlyB
the lube oil cooler to be bypassedC
positive lube oil pump suction to be assuredD
galvanic action in the cooler to be minimized
考题
单选题A lube oil filter can be used to remove most contaminants from lube oilA contaminant which will remain in the lube oil after filtering is （）.A
acidB
fuel oilC
sedimentD
water
考题
单选题A dirty fuel oil filter element can be detected by （）A
Visual inspection of the elementB
the pressure drop cross the filterC
high fuel oil tank temperatureD
increase flow rate from the filter
考题
单选题The three conditions which cause engine shutdown are overspeed，low lube oil pressure，and（）.A
High lube oil pressureB
High jacket water pressureC
High jacket water temperatureD
Low jacket water pressure
考题
单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.A
open the bypass lineB
cut in the lube oil coolerC
pressurize the lube oil systemD
top off the expansion tank
考题
单选题In a full flow type lube oil system, the bypass relief valve will lift due to （）A
a clogged filter elementB
excessive lube oil pump discharge pressureC
excessive lube oil flowD
excessively hot lube oil
考题
单选题It is necessary for us （） after having served for a certain period.A
to change the lube oilB
have the lube oil purifiedC
have the lube oil burntD
to analyze the lube oil
考题
单选题Increasing differential pressure of an oil filter indicates that （）A
it is dirtyB
it is leakyC
it has been renewedD
all the above
考题
单选题A dirty fuel oil filter is can be detected by （） Ⅰ.fuel oil analysis Ⅱ.observing the pressure drop across the filterA
ⅠonlyB
ⅡonlyC
eitherⅠorⅡD
neitherⅠnor
考题
单选题Overflow valve is used to （）A
control the fluid flow through itB
prevent the pressure before it over the specified valveC
make the pressure after it steadyD
control the direction of oil flow
考题
单选题The liquid flowing in the capillary is such that the difference in （） readings taken before the capillary and after it is related to the oil viscosity.A
pressureB
velocityC
flow rateD
temperature
考题
单选题An automated diesel engine should normally shut down due to （）A
low lube oil temperatureB
high ambient air temperatureC
low tube oil pressureD
high exhaust system back pressure
考题
单选题The pressure differential across a diesel engine lube oil system duplex filter should be checked to （）A
determine the need for filter cleaningB
measure any change in oil viscosityC
prevent damage to the filterD
determine the need for batch filtration
考题
单选题Misfiring in a diesel engine at light loads can be caused by（）A
high lube oil temperatureB
low lube oil temperatureC
excessive cylinder coolingD
high air injection pressure
考题
单选题Which of the listed failures, occurring in an automated diesel generator system, should cause an audible alarm at the engine room control station?（）A
Low cooling water outlet temperatureB
High lube oil pressureC
Low lube oil temperatureD
Low starting air pressure
热门标签
最新试卷
