更多"（）is harmful for fuel pumps, fuel v"的相关试题:
[单项选择]Cylinder wall temperature, fuel oil supplier, and oil passage （）.
A. are interdependent
B. are not interdependent
C. have nothing to do with each other
D. are independent
[单项选择]Differential needle valves used in fuel injectors are directly closed by（）
A. cam action
B. spring force
C. fuel oil pressure
D. firing pressure
[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]（） into the cylinder because no fuel can burn （） it.
A. Air must be admitted；without
B. Oil must be injected；without
C. Air must be admitted；with
D. Oil must be injected；with
[单项选择]Valves in the cylinder head of a diesel engine are opened by the direct action of the（）
A. exhaust pressure
B. valve spring pressure
C. rocker arm movement
D. wrist pin movement
[单项选择]Fuel injection valves should be taken out, cleaned, and lifting checked every （）.
A. two to four months
B. four to six months
C. six to eight months
[单项选择]What is the harmful effect of sulfur in a fuel?（）
A. It causes excessive smoking and soot at low firing rates
B. It doesn’t readily burn when combined with oxygen
C. It clogs fuel oil strainers more often
D. It forms a corrosive acid when mixed with water or water vapor
[单项选择]Fuel is not supplied to the corresponding cylinder due to a failure of （）.
A. the motor
B. the fresh water generator
C. the governor
D. the fuel pump
[单项选择]Fuel oil discharged to the diesel engine cylinder is atomized at the （）
A. turbocharger
B. injection nozzle tip
C. carburetor
D. fuel oil pump
[单项选择]The fuel injection pumps on a diesel engine are controlled by a linkage system attached to the （）
A. camshaft
B. crankshaft
C. governor
D. flywheel
[单项选择]Blow-off of the relief valves of the main cylinders during operation indicates （）.
A. the cylinder cover is cracked
B. the injector holes is clogged
C. the cams are not properly set
D. fuel pump is leaking
[单项选择]The engine has one or two group of fuel pumps, depending upon （）.
A. the number of fuel valves
B. the number of cylinders
C. the speed of engine
D. the power of engine
[单项选择]Fuel injected into a diesel engines cylinder is ignited by （）.
A. the heat compressed fuel/air mixture in the cylinder
B. the fuel igniter
C. the fuel injector
D. the fuel pump
[单项选择]When fuel is injected in a diesel engine cylinder too early, （）
A. ignition may be delayed
B. fuel economy is not affected
C. exhaust gas temperature will be unchanged
D. the exhaust will be clear
[单项选择]Fuel is admitted to a diesel engine cylinder through the （）.
A. intake valves
B. carburetor
C. exhaust ports
D. injector nozzles
[单项选择]Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the （）
A. electronic ignition system
B. compression of air by the piston
C. friction in the fuel injector
D. fuel oil bearing system
[单项选择]Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will（）
A. increase engine power
B. increase engine load
C. decrease engine power
D. improve fuel economy
[单项选择]Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the （）.
A. intake stroke
B. exhaust stroke
C. power stroke
D. compression stroke
