更多"The diesel engine consumes consider"的相关试题:
[单项选择]In an ordinary diesel engine the fuel injection begins （）
A. after TDC
B. before TDC
C. after BDC
D. before BDC
[单项选择]On a diesel engine, fuel is delivered into the combustion space by （）.
A. a cooling system
B. a lubrication oil system
C. an electric system
D. an injection system
[单项选择]In a diesel engine, fuel must be broken up into a spray of fine droplets to （）.
A. increase its quality
B. obtain complete burning
C. reduce its weight
D. all of the above
[单项选择]Diesel engine fuel oil contamination often results in （）
A. governor malfunctions
B. fuel injection system malfunctions
C. high cylinder lube oil temperatures
D. low intake temperatures
[单项选择]The most common diesel engine fuel system problems are caused by （）.
A. incorrect adjustments
B. dirty fuel
C. broken fuel lines
D. excessive vibration
[单项选择]Faulty operation of diesel engine fuel injection nozzles can be directly caused by （）.
A. water in the fuel oil supply
B. excessive fuel nozzle holder cooling
C. a distorted fuel spray pattern
D. leakage past the plunger into the oil drain
[单项选择]Significant retardation of a diesel engine fuel injection timing will result in （）
A. smoother engine operation
B. advanced fuel ignition
C. increased fuel economy
D. reduced engine power
[单项选择]Problems with the diesel engine fuel injection pump are usually caused by（）
A. improper adjustment
B. contaminated fuel
C. kinked fuel lines
D. excessive engine vibration
[单项选择]If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will（）
A. backfire through the air intakes
B. develop less power under load
C. have high firing pressures
D. lift its cylinder relief valves
[单项选择]Permitting a diesel engine fuel oil day tank to run dry can cause （）
A. overheated injection pumps
B. water condensation in the cylinders
C. fuel dilution of the lube oil
D. air in the fuel system
[单项选择]Clogged diesel engine fuel oil filters can cause（）
A. loss of power
B. misfiring
C. low fuel oil pressure
D. All of the above
[单项选择]In the cylinder of a diesel engine fuel is ignited by the（）
A. spark from a plug in the pre-combustion chamber
B. electrical discharge from the distributor
C. heat of compression within the cylinder
D. heat from the fuel injection nozzle
[单项选择]A leaking diesel engine fuel injector will cause（）
A. prolonged maintenance intervals
B. improved atomization
C. greater fuel economy
D. incomplete combustion
[单项选择]In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with（）
A. low firing pressure
B. low exhaust temperature
C. mechanical knock in each cylinder
D. fuel knock in each cylinder
[单项选择]When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?（）
A. Quantity of fuel injected tends to be decreased
B. Quantity of fuel injected will always be increased
C. Start of injection tends to be advanced
D. Duration of injection will always greater
[单项选择]Operating a propulsion diesel engine at less than 30% of designed normal load for prolonged periods will result in （）.
A. decreased fuel consumption per brake horsepower
B. more complete cylinder scavenging
C. extended valve life
D. carbon formation on combustion chamber surfaces
[单项选择]A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine（）
A. has little or no internal friction
B. has a lower effective compression ratio
C. operates with scavenge air under a positive pressure
D. operates without energy absorbing intake and exhaust strokes
