更多"The breaking-up of fuel as it enter"的相关试题:
[单项选择]Fuel oil contamination of an auxiliary diesel engine lube oil can result in（）
A. an increased flash point
B. higher lube oil pressures
C. an increased viscosity
D. lower lube oil pressures
[单项选择]Diesel fuel vapors （）.
A. can not be ignited by a spark unless the vapor is in a confined space
B. are nontoxic in all concentrations
C. can not be ignited by a spark unless they are at their auto-ignition temperature
D. are heavier than air
[单项选择]Maintaining the close tolerances in diesel fuel pumps and injectors requires the use of（）.
A. fuel/water separators
B. day tanks
C. injector test stand
D. fuel filters
[单项选择]Diesel fuel的中文含义是（）。
A. 汽油
B. 柴油
C. 煤油
D. 机油
[单项选择]When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer，the （）
A. quantity of fuel injected is decreased
B. quantity of fuel injected will always be increased
C. start of injection is advanced
D. duration of injection will always be greater
[单项选择]Proper filtering and straining of diesel fuel is important because the（）
A. fuel oil pump will over-speed if dirt is not removed
B. fuel oil transfer pumps cannot tolerate small amounts of grit in the oil
C. fuel injectors may be damaged by foreign particles in the fuel oil dirty
D. fuel will clog the intake air filter
[单项选择]The ignition quality of a diesel fuel is indicated by the （）
A. cetane number
B. volatility point
C. viscosity index
D. octane number
[单项选择]The ignition quality of diesel fuel is indicated by its（）
A. octane number
B. cetane number
C. viscosity in Saybolt seconds
D. air fuel ratio
[单项选择]The cetane rating of diesel fuel is an indication of the （）
A. ignition quality of the fuel
B. calorific value of the fuel
C. flash point of the fuel
D. rate of fuel consumption
[单项选择]What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
A. Spark plug
B. Heat of compression
C. Carburetor
D. Glow plug
[单项选择]The ignition quality of a diesel fuel oil is indicated by the （）
A. specific gravity
B. cetane number
C. viscosity
D. calorific valve
[单项选择]The cetane number of a diesel fuel oil indicates its（）
A. Viscosity
B. acid content
C. heating value
D. ignition quality
[单项选择]Diesel fuel is relatively safe to handle due to its low volatility, but the fumes will self-ignite and continue to burn steadily if the fuel is heated to the （）.
A. flash point
B. auto-ignition point
C. volatility point
D. upper explosive limit
[单项选择]If the diesel fuel vapors present are within the flammable range （）.
A. the vapor air mixture is too rich to burn
B. an explosion may occur if a source of ignition is present
C. the vapor air mixture is too lean to bum the upper explosive
D. limit has been exceeded
[单项选择]With respect to diesel fuel, the ease with which a cold engine will start is dependent upon the（）
A. ignition quality of the fuel
B. high heating value of the fuel
C. amount of carbon residue after combustion
D. internal flow resistance in the injectors
[单项选择]If the low level alarm of the diesel fuel day tank fails to function, you can expect trouble from（）
A. overheated injection pumps
B. water condensed in the cylinders
C. fuel dilution of the lube oil
D. air in the fuel system
[单项选择]Diesel oil may be used to cool （） of a diesel engine.
A. cylinders
B. exhaust valves
C. pistons
D. fuel valves
