Fuel
What is considered a mid-grade gasoline?
Octane rating equal to 88 and less than or equivalent to 90
What are carburetors used for?
To combine gasoline and air
What is the most common type of fuel delivery used to get fuel from the fuel tank to the EFI system?
Electric
Where can the oxygen O2 sensor be installed?
Exhaust
With the addition of alcohol to gasoline and changes to refinery processes, power equipment manufacturers do NOT recommend storing fuel for more than what length of time?
30 Days
What is the purpose of the float assembly?
To control the level of fuel in the fuel bowl
In a gravity feed system, the fuel tank is positioned where in relation to the carburetor?
Above
What sensor only functions after warming up to the operating temperature?
Oxygen sensor
Gasoline’s ability to become a vapor correctly defines which of the following terms?
Volatility
During consumption the amount of fuel in the float bowl is what?
Reduced
What is the purpose of fuel injectors?
To atomize the fuel into a mist for better combustion
Which of the following sensors provides the ECU with a signal for determining engine load?
Manifold absolute pressure (MAP) sensor
What is a benefit of alcohol-based fuels?
Improves emissions
Boosts octane
Decreases U.S. dependency on imported oil
What exists to limit afterbang after the engine is turned off?
Fuel solenoids
What are usually found in the form of a screen basket?
Pre-tank filters
What sensor allows the ECU to increase or decrease the fuel mixture and spark timing to adjust for deceleration, acceleration and changes in load?
Throttle position (TPS) sensor
Fuel refined for use in a warmer climate will be what?
Resistant to vapor lock
The reduction in pressure resulting in fluid being forced through a constricted passage is known as what?
The Venturi effect
What is ECU the acronym for?
Engine Control Unit
What distributes the air/fuel mixture from the carburetor to the cylinder(s)?
Throttle Body/Intake Manifold