What is used to clean the fuel entering the engine?
Fuel pumps are either ________________.
On many types of engines, what measures the volume (quantity) and mass (density) of the air entering the engine?
Crude oil is a ________________ energy resource.
What does it mean if a fuel is very volatile?
What is the name of the technology that uses engine control systems to shut off the air-fuel mixture to some of the engine’s cylinders when all the cylinders are not needed?
Which of the following would be a lean air-fuel mixture in a gasoline engine?
Which of the following would be a rich air-fuel mixture in a gasoline engine?
Some vehicles use a mechanical high pressure fuel pump that pressurizes fuel up to _____________ psi.
Many new vehicles use _______________ throttle controls, often called drive-by-wire or throttle-by-wire.
Removing __________ from diesel fuel is critical.
Which of the following does NOT impact the price of fuel?
Technician A says that gasoline is more volatile than diesel. Technician B says that distillation is the process used to refine crude oil. Who is correct?
Technician A says that the higher the octane number of gasoline, the more it resists detonation. Technician B says that 93 octane is required for most cars. Who is correct?
Technician A says that an example oxygenate is sulfur. Technician B says that lead is used today in the United States to oxygenate fuel. Who is correct?
Technician A says that diesel engines are only used in large trucks. Technician B says that diesel fuel has more energy per volume than gasoline. Who is correct?
Technician A says one way to increase fuel economy is to make sure your tires are properly inflated. Technician B says one way to increase fuel economy is to avoid excessive idling. Who is correct?
What is fuel grade and why is it important?