ASE F1 Compressed Natural Gas Vehicles Practice Questions - ASE F1 - Compressed Natural Gas Vehicles Certification Exam

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A pre-service inspection of a CNG vehicle should include verifying that the manual shutoff (1/4-turn) valve operates correctly. The primary purpose of this valve is to:

Isolate the cylinder(s) from the rest of the fuel system Regulate fuel pressure to the injectors Vent the cylinder to atmosphere automatically Increase storage pressure during fast fill

Correct Answer:

Isolate the cylinder(s) from the rest of the fuel system

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