更多"The ability of lubricating oils to "的相关试题:
[单项选择]（） fuel oils （） lubricating oils require treatment before passing to the engine.
A. Both；and
B. Neither；nor
C. Either；or
D. Both；or
[单项选择]The pour point of lubricating oils is affected the most by which of the following?（）
A. Extensive centrifuging
B. Wax content
C. Water content
D. Acid content
[单项选择]Although lube oils used in the main lubricating service systems should have a relatively high flash point to avoid ignition, they can create smoke and fire hazards when they（）
A. are exposed to a vacuum
B. come in contact with extremely hot surfaces
C. are reduced in temperature to just above the pour point
D. become extremely agitated or aerated
[单项选择]Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause （）.
A. carbon deposits on the compressor suction valves
B. the evaporator temperature to increase
C. rapid corrosion of the thermal expansion valve
D. no operating problems
[单项选择]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. Bypass
[单项选择]The oil lubricating diesel engine cylinders usually contain additives formulated to impart a high degree of alkalinity to （） the acid conditions.
A. invade
B. provide
C. detergent
D. neutralize
[单项选择]Lubricating systems for diesel engines are usually designed to initially provide lube oil to the engine （）
A. camshaft beatings
B. main bearings
C. piston crowns
D. cylinder walls
[单项选择]Excessive lubricating oil consumption in a running diesel engine can be caused by （）
A. clogged lube oil piping
B. excessive valve-guide clearance
C. high lube oil viscosity
D. low lube oil temperature
[单项选择]One characteristic of a lubricating oil adversely affecting the result of centrifuging is （）
A. high TBN value
B. low oil floc point
C. low oil demulsibility
D. low oil neutralization number
[单项选择]One of function of diesel engine lubricating oil is to （）
A. induce carbon formation on cylinder walls
B. improve fuel penetration in the combustion space
C. form a friction reducing film between mating surfaces
D. lubricate the fuel injection
[单项选择]For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a/an （）.
A. oil spray
B. oil bath
C. oil control rings
D. drilled passage through the camshaft
[单项选择]Lubricating oil viscosity in an operating diesel engine can be reduced by（）
A. increasing cooling water flow
B. increasing lube oil flow
C. dilution by fuel oil
D. adding SAE 70 oil
[单项选择]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 cheat
B. air receiver
C. crankcase
D. water box
[单项选择]The （）pump is usually used as the lubricating oil pump.
A. turbine
B. screw
C. vaneejector
D. centrifugal
[单项选择]There should be a lubricating oil （） between the main beatings and the crankshaft.
A. film
B. cap
C. lacquer
D. shell
[单项选择]The remaining oil in the lubricating pipes and ducts should be blown out with （）.
A. atmosphere
B. the fresh water
C. compressed air
D. chemical compounds
[单项选择]Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.
A. overspeed trip
B. audible/visual alarm
C. the ships/boats general alarm
D. reserve oil storage tank
[单项选择]Lubricating oil systems are fitted with a wide variety of strainers some of which can be cleaned in site while others have replaceable cartridgesThe bold and italic word “which” means （）.
A. lubricating oil
B. lubricating oil systems
C. strainers
D. cartridges
