What is used to clean the fuel entering the engine?
Knock Sensor
PCV Valve
Fuel Filter
Air Filter
Fuel pumps are either ________________.
mechanical or electric
chemical or electric
nuclear or electric
thermal or electric
On many types of engines, what measures the volume (quantity) and mass (density) of the air entering the engine?
temperature sensor
mass airflow sensor
knock sensor
cooling fan sensor
Crude oil is a ________________ energy resource.
renewable
inexhaustible
nonrenewable
solar
What does it mean if a fuel is very volatile?
is expensive
has great lubricating abilities
does not ignite easily
ignites easily
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?
cylinder deactivation
powertrain control module
blow-by
distillation
Which of the following would be a lean air-fuel mixture in a gasoline engine?
8:1
12:1
14.7:1
16:1
Which of the following would be a rich air-fuel mixture in a gasoline engine?
12:1
14.7:1
16:1
18:1
Some vehicles use a mechanical high pressure fuel pump that pressurizes fuel up to _____________ psi.
2.9
29
2900
29000
Many new vehicles use _______________ throttle controls, often called drive-by-wire or throttle-by-wire.
electronic
mechanical cable
mechanical rod
Wi-Fi
Removing __________ from diesel fuel is critical.
oil
water
molecules
dispersants
Which of the following does NOT impact the price of fuel?
taxes
supply and demand
crude oil prices
the type of vehicle you drive
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
Technician B
Both Technician A and Technician B
Neither Technician A nor Technician B
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
Technician B
Both Technician A and Technician B
Neither Technician A nor Technician B
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
Technician B
Both Technician A and Technician B
Neither Technician A nor Technician B
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
Technician B
Both Technician A and Technician B
Neither Technician A nor Technician B
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?