Introduction to Fuel Metering

What is the primary purpose of fuel metering in engines?

• To increase fuel consumption

• To deliver the correct amount of fuel to the engine

• To reduce engine noise

• To enhance engine aesthetics

What is the primary function of the float chamber in an aircraft float carburetor?

• To mix fuel and air

• To maintain constant fuel level

• To control air-fuel mixture flow

• To create pressure drop for fuel draw.

The venturi in an aircraft float carburetor is responsible for creating a ______.

• constant fuel level

• air-fuel mixture

• pressure drop for fuel draw

• fuel inlet

What is the function of the needle valve in a carburetor mixture control system?

• To regulate air flow

• To control fuel flow

• To adjust throttle position

• To measure fuel pressure.

In a carburetor mixture control system, the _______ valve is responsible for adjusting the flow of the air-fuel mixture.

• Throttle

• Needle

• Check

• Discharge

What happens to the pressure as it goes through the narrow body of the venturi?

• It increases

• It decreases

• It remains the same

• It fluctuates.

In the context of density, fill in the blank: Higher pressure results in ______ density.

• lower

• higher

• constant

• zero

What is the purpose of a Mixture Control System?

• To adjust the fuel mixture supplied to an engine

• To increase engine speed

• To decrease fuel consumption

• To enhance engine noise.

The Variable orifice mixture control allows the pilot to ______ the mixture ratio.

• ignore

• fine-tune

• disrupt

• complicate

What is the primary function of the idle system in a carburetor?

• Provides fuel at high engine speeds

• Provides fuel at low engine speeds

• Increases engine power

• Reduces fuel consumption