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

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Before servicing a CNG vehicle, what is the FIRST step a technician should take during a pre-service vehicle inspection?

Verify the vehicle and CNG fuel system are correctly identified and review service history Defuel the high-pressure cylinders immediately Replace the pressure relief device Pressurize the system to 4,500 psi for testing

Correct Answer:

Verify the vehicle and CNG fuel system are correctly identified and review service history

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