题目内容

The end of the rocker arm is operated by an eccentric on the______.

A. crankshaft
B. camshaft
C. countershaft
D. input shaft

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In the EFI system, it is possible to have systems using only one injector per engine or one injector per ______.

A. piston
B. cylinder
C. crankpin
D. stroke

Fuel is injected into the area around the throttle valve, where air velocity is at a ______.

A. minimum
B. maximum
C. middle
D. fit

Each cylinder has its own ______that delivers fuel directly to the intake valve.

A. injective
B. inject
C. injector
D. injected

EFI supplies an accurate air/fuel _____ to the engine no matter what operating conditions are encountered.

A. proportion
B. scale
C. ratio
D. number