Exam 38: Natural Gas, Propane, and Biodiesel Fuels

Technician A says that when a CNG commercial vehicle is serviced in a facility not specifically designed for NG vehicles, 50% of the roll-up doors must be raised at least 12-inches (25cm) from the ground. Technician B says that when a CNG commercial vehicle is serviced in a facility not specifically designed for NG vehicles, the extraction and ventilation system must be turned on a be capable of exchanging 5 times the total shop volume of air per hour. Who is correct??

When diesel fuel is used as the pilot in a dual diesel/CNG fuel system, what role does the diesel fuel play?

What is biomethane sourced from?

Which of the following industrial processing methods is currently used to yield hydrogen from water?

Technician A says that a major disadvantage of using B100 biodiesel as a fuel on North American highways is its high pour point temperature. Technician B says that a disadvantage of using biodiesel cuts as fuels is faster fuel degradation than on equivalent 100% petroleum sourced diesel fuel. Who is correct?

Which of the following operating conditions is the least suitable for B100 biodiesel fueling of a current diesel engine application powering a truck?

Technician A says that the Westport CNG-DI Mono injector is designed to inject NG but can also be used to inject hydrogen. Technician B says that the Westport CNG-DI Mono injector incorporates a diesel pilot capability to ignite the fuel charge. Who is correct?