题目内容

Injection lag can be caused by ____.

A. improper timing of the intake valves
B. setting of the pump plunger
C. compressibility of the fuel
D. position of the needle valve

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The time between injection and ignition of the fuel is known as ____.

A. turbulence lag
B. after burning ratio
C. pre-ignition lag
D. ignition delay

The fuel injector injects a fine spray of fuel into the hot air and combustion _____, producing much high pressure in the gases.

A. has begun
B. takes place
C. occur
D. happen

The injector pump is operated by a cam which drives the _____ up and down.

A. needle valve
B. plunger
C. piston
D. cylinder

VIT means___________.

A. Variable Injection Timing
B. Variable Inlet Tonnage
C. Vertical Incoming Tonnage
D. Vertical Inlet Tank

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