题目内容

Injecting the fuel______ in relation to the movement of the crankshaft.

A. at the right time
B. at the same time
C. in time
D. by time

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The EFI system does not rely on any major adjustments for cold enrichment or fuel metering. Because the system is mechanically simple ,maintenance requirements are _______.

A. fortified
B. augmented
C. added
D. reduced

Any fuel that is not delivered to the ____manifold by the injector is returned to the tank through a fuel return pipe.

A. closed
B. open
C. exhaust
D. intake

During cold engines starting ,many engines incorporate a cold start injector designed to improve______below a specified coolant temperature.

A. stability
B. driveability
C. reliability
D. startability

The ECU____ the injector to deliver just enough fuel to achieve an ideal air/fuel ratio of 14.7:1.

A. send
B. site
C. cite
D. signals

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