Page 39 - ESP Participant Guide_Neat

Module 4: NGV Safety Practices and Procedures

Module 4: Knowledge Check

NGV industry best practices recommend inspection of the entire CNG fuel system:
□ Every 3 years or 36,000 miles
□ After any fire
□ After any accident
□ All of the above

It is unsafe to bring a known leaking vehicle inside a maintenance facility; leaking vehicles should remain outdoors.
□ True
□ False

Signs of a gas leak on a CNG vehicle include:
□ Hearing a hissing sound
□ Smelling the “rotten egg” odor of natural gas
□ Formation of ice around a fitting
□ All of the above

The first step when servicing the CNG fuel system on a natural gas vehicle is to:
□ Identify the component and know whether it is a high- or low-pressure component
□ Turn off the gas supply
□ Defuel the vehicle
□ Check the methane detection system

The most common safety practice when welding on or in close proximity to natural gas vehicles is to:
□ Conduct welding outdoors
□ Protect the CNG fuel system components with a welding blanket
□ Check the methane detection system
□ None of the above

NGV Essentials and Safety Practices © 2019 NGVi All Rights Reserved Page 4-4