Small Engine Tech-Carburetor Quiz

A governor malfunction that results in engine speed oscillations is known as ____________.

A carburetor relies on ____________________ in pressure to mix fuel and air and to keep the mixture moving in the right direction.

What is a reservoir containing extra fuel that is drawn into the airstream when the throttle valve is suddenly opened?

What part of the carburetor increases the speed of airflow and decreases pressure?

At normal engine speed under normal operating conditions, the proper air-fuel mixture ratio is typically ________ parts air to 1 part fuel.

The carburetor causes fuel to flow through the main nozzle into the airstream; lowers the boiling point of the fuel, causing some of the fuel to vaporize before it reaches the cylinder; and increases the speed of the airstream, atomizing the fuel leaving the main nozzle when there is a _______________ ________________.

What are the three groups carburetors can be categorized into, based on the airflow through the air horn?

What part of the carburetor is responsible for maintaining a constant fuel level in the float bowl?

If the float springs a leak or becomes saturated and sinks, too much __________ will be provided to the engine.

The purpose of the ____________ is to provide a rich mixture for cold engine starting.

When the throttle valve is completely closed in a natural draft carburetor, most fuel is provided to the engine through the ______________ _______ ____________.

What kind of carburetor has an integral impulse fuel pump?

What kind of carburetor is always mounted on top of the fuel tank?

These primers increase air pressure in the float bowl, forcing fuel up the main nozzle.

As engine load decreases and engine speed increases, a governor with __________ the throttle.

What type of governor adjusts engine speed based on the movement of flyweights on the governor gear?

Vacuum governors are located between the carburetor and the _____________ ________________.

In an EFI system, what does the MAP sensor send information about?

The IAT sensor improves the efficiency of a fuel injection system because it sends a signal to the ECU that allows the ECU to make adjustments to the fuel mixture based on ________ ____________________.

This sensor is used only in closed-loop EFI systems, monitors the chemical composition of exhaust gases, and provides feedback to the ECU that is used to adjust fuel trim.

Delivers fuel to the venturi when the engine is operating at speeds above idle.

What restricts airflow into the carburetor to enrich the air-fuel mixture?

What reduces air pressure in the float bowl when the engine is operating at part throttle?

What regulates the amount of air-fuel mixture entering the cylinder?

What increases air velocity and reduces pressure by restricting the carburetor's air passage?

What maintains a constant fuel level within the carburetor?

What provides additional fuel when airflow through the carburetor is maximized?

What delivers a small amount of air-fuel mixture to the cylinder when the throttle valve is closed?