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 removal of （） from lubricating oil will reduce engine wear and possible breakdowns.
A
contaminating water
B
contaminated additives
C
contaminated fuel
D
contaminating impurities
参考答案
参考解析
解析：
暂无解析
更多 “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” 相关考题
考题
On a medium-speed main propulsion diesel engine, the crank-pin or crank journalbearings receive lubricating oil from( ).A.a spindle lubricatorB.an oil jetC.internal splashingD.drilled passages in the crankshaft
考题
In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a drilled passage in the crankshaft to the bottom end bearing and then up a connection rod to theA.crossheadB.crankpinC.crank journalD.gudgeon pin
考题
In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .A.all of the oil used by the engine through a filterB.some of the oil used by the engine through a filterC.some of the oil used by the engine through a centrifugeD.all of the oil used by the engine through a centrifuge
考题
Which lubricating oil additive is used in diesel engines to reduce the tendency(倾向)for sludge and varnish to form on the engine parts?A.Flash point improversB.Pour point improversC.InhibitorsD.Foam suppressors(抑制物)
考题
单选题Black smoke exhausting from an operating diesel engine is an indication of poor combustion which may be caused by （）A
water in the fuelB
insufficient fuel for combustionC
clogged air intake passagesD
burning lubricating oil
考题
单选题An over-speed trip stops a diesel engine when the engine （）A
runs out of fuelB
has low lubricating oil pressureC
exceeds a set maximum speedD
has high cooling water temperature
考题
单选题Excessive lubricating oil consumption in a running diesel engine can be caused by （）A
clogged lube oil pipingB
excessive valve-guide clearanceC
high lube oil viscosityD
low lube oil temperature
考题
单选题In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a drilled passage in the crankshaft to the bottom end bearing and then up a connection rod to the （）.A
crossheadB
crankpinC
crank journalD
gudgeon pin
考题
单选题In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a （） in the crankshaft to the bottom end bearing andthen up a connection rod to the gudgeon pin.A
telescopic pipesB
large boreC
drilled passageD
tied rod
考题
单选题（） is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank.A
A filterB
A centrifugeC
A distillerD
A generator
考题
单选题When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.A
filter to remove the fuel oilB
use the settler to remove the fuel oilC
remove the fuel oil by centrifugingD
drain and then renew the lube oil supply
考题
单选题Lubricating oil for an engine is stored at the bottom of the （）, known as the sump or in a drain tank located beneath the engine.A
sea cheatB
air receiverC
crankcaseD
water box
考题
单选题The oil pressure and flow from each bearings can be checked when（）A
the lubricating pumps are stopped and the access doors are openedB
the lubricating pumps are running and the access doors are openedC
the engine is running and the access doors are closedD
the engine is stopped and the access doors are closed
考题
单选题Gas exchange, which is a basic part of the cycle of an internal combustion engine, is（）A
the supply of normal air and removal of compressed airB
the supply of fuel oil and combustion of the atomized oilC
the supply of fresh air and removal of exhaust gasesD
the supply of fresh air and removal of the extra heat
考题
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
Excessive fuel consumptionC
Severe heat stresses on mechanical partsD
Foaming of the lubricating oil
考题
单选题Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.A
overspeed tripB
audible/visual alarmC
the ships/boats general alarmD
reserve oil storage tank
考题
单选题If the detergent type lubricating oil being used in a diesel engine is black, the oil （）A
must be centrifugedB
must by filteredC
must be changedD
is holding finely dispersed carbon in suspension
考题
单选题On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.A
a spindle lubricatorB
an oil jetC
internal splashingD
drilled passages in the crankshaft
考题
单选题（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.A
The driven gearB
The driveC
The greaseD
The lubricating oil
考题
单选题In engines with system, the lubricating oil can be added to the engine through the filling hole in the crankcase cover, by using a hand oil can, or through the separator pipe（）A
lubricating oilB
dry sumpC
circulated tankD
wet sump
考题
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
neutralize
考题
单选题Engine coolant accumulating in the diesel engine lubricating oil can result from a （）A
low oil pressureB
high coolant pressureC
leaking fuel injectorD
cracked cylinder head or liner
考题
单选题In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.A
metal particles loosened by wearB
air when no air cleaners are usedC
condensation of water vaporsD
breakdown of the lubricating oil by dilution
考题
单选题Lubricating oil viscosity in an operating diesel engine can be reduced by（）A
increasing cooling water flowB
increasing lube oil flowC
dilution by fuel oilD
adding SAE 70 oil
考题
单选题Lubricating oil used in a diesel engine serves to（）A
reduce the wear of bearing surfacesB
cool the bearing surfacesC
assist in sealing bearing surfacesD
all of the above
考题
单选题Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）A
SplashB
GravityC
PressureD
Bypass
考题
单选题Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?（）A
Flash point improversB
Pour point improversC
InhibitorsD
Foam suppressors
热门标签
最新试卷