Exam 28: Gasoline, Diesel, and Other Fuels

In the past the limit for sulfur content in diesel fuel was 500 ppm [parts per million]. The current standard for low sulfur diesel fuel allows a maximum of _____ of sulfur in the fuel.

Which of the following are characteristics of burning LP-gas?

Which of the following statements about P-series fuel is NOT true?

While diagnosing a diesel engine driveability problem: Technician A says that while the scan tool data is similar to that available for a gasoline engine, all diesel engine troubleshooting procedures are unique. Technician B says a cylinder power balance check can be made by checking the resistance of the engine's glow plugs. Who is correct?

The volatility of gasoline affects all the following performance characteristics or driving conditions EXCEPT:

Technician A says lean ratios of 15:1 to 16:1 provide the best fuel economy. Technician B says rich mixtures have a ratio below 14.7:1 and provide more power from the engine but greater fuel consumption. Who is correct?

Because diesel engines burn less fuel, they also emit less CO₂.

Ethanol has an octane rating of ___________________.

A gasoline engine provides more torque at lower speeds than an electric motor.

A fuel cell converts fuel into electricity.

Technician A says that the use of methanol in internal combustion engines has declined over the years. Technician B says that the use of MTBE as a gasoline additive has declined over the years. Who is correct?

Biomass fuels are those derived from nonfossil sources and produced from plant or animal products or wastes.

Excessive alcohol in the fuel may cause ______.

Technician A says that dedicated vehicles are those designed to use one particular type of fuel. Technician B says that bi-fuel vehicles can operate solely on an alcohol-based fuel or unleaded gasoline, or a mixture of the two, which gives the driver flexibility and convenience when refilling the fuel tank Who is correct?

LP-gas delivers more power than gasoline.

A diesel fuel's ignition quality is measured by a ___________________ rating.

Compressed natural gas (CNG) is the cleanest alternative fuel.

Describe the term "Reid vapor pressure (RVP)."

Technician A says blending 10 percent ethanol into gasoline results in an increase of 2.5 to 3 octane points. Technician B says ethanol is highly corrosive and highly toxic. Who is correct?

LNG [liquefied natural gas] is not a practical fuel for personal use and is only used in heavy-duty applications.