AVIA 1065 Carburetor Systems Quiz

Carburetors have six systems which work together to provide engine operation at different loads and speeds.

Delivers fuel at speeds above idling, based on pressure drop in venturi.

Supplies fuel at low speeds where the main metering system is ineffective.

Provides extra fuel during throttle openings to avoid a lean mixture.

A small pump in the accelerating system that quickly adds fuel when the throttle changes.

A component of the idling system that delivers fuel at low engine speeds.

A type of carburetor that uses a float to maintain a constant fuel level.

difference in air pressure in the venturi throat, helps determine fuel supply.

Controls airflow into the engine, and therefore engine speed.

A fuel-air mixture with insufficient fuel for complete combustion.

A system in a carburetor that adjusts the fuel-to-air ratio in the engine's intake.

The proportion of fuel and air in the engine intake mixture.

The mass of air per unit volume.

As altitude increases, air density decreases, requiring adjustments to the fuel/air ratio.

A system that automatically adjusts the fuel flow to compensate for changes in air density.

A system that enables the pilot to adjust the fuel/air ratio manually.

A constricted section of a carburetor that creates a low pressure area, drawing in fuel.

A manual device for controlling the fuel/air mixture by adjusting a nozzle.

A manual device to control the flow of fuel using a back suction.

The system that controls fuel level in a carburetor.

Without fuel, the float sinks, opening the needle valve.

The float rises with fuel, closing the needle valve to maintain a set fuel level.

When the engine runs, fuel is drawn out; the needle valve position regulates the required fuel flow.

The discharged fuel flow is controlled by air speed through the venturi.

Atmospheric pressure forces fuel out from the fuel chamber for a controlled rate.

Air velocity through a venturi controls the fuel discharge rate, regulating precise fuel flow.

The venturi in a carburetor proportionally mixes fuel and air, lowers pressure at the discharge nozzle, and limits airflow at full throttle.

Part of the carburetor that controls fuel flow in the main metering system.

Limits fuel flow at wide-open throttle in the carburetor.

A system using a needle valve in the float chamber to adjust fuel flow to the nozzle.

A fuel-air mixture with more fuel than ideal for engine operation.

The mixture control setting that completely stops fuel flow to the engine.

Part of the manual mixture control that completely stops fuel discharge from the carburetor at idle cutoff.

Automatically enriches the mixture during high power operation for maximum power.

A system (often a part of the power enrichment system) that helps save fuel when the engine isn't at full power.

Ice formation in a carburetor, often linked to low pressure fuel discharge and temperature drop in the venturi.

Abrupt maneuvers affecting float action, incomplete vaporization, and difficulty discharging fuel in certain systems.

A carburetor that discharges fuel at pressure higher than atmospheric, improving vaporization and reducing icing.

Better fuel vaporization, reduced icing, and less susceptibility to rough air effects.

Ignition of unburned fuel in the induction system, cylinders, and exhaust after the engine stops, potentially causing kickback.

Aircraft engines are often shut down by cutting off fuel flow, rather than solely by turning off the ignition.

Increases fuel flow at high power output for better engine cooling and maximum power.

The narrowest point in the carburetor venturi, where air velocity increases and pressure decreases.

The nozzle in the carburetor where fuel is sprayed into the airstream.

A jet that limits fuel flow through the carburetor, placed between the float chamber and discharge nozzle.

The pressure differential between the float chamber and the discharge nozzle, causing fuel flow from the discharge nozzle.

The finely divided fuel droplets that come out of the discharge nozzle.

The difference in pressure between two points, often the float chamber and the discharge nozzle.

A small hole that allows air to enter the fuel nozzle, reducing fuel density and improving vaporization.

A system that enriches the fuel mixture at high throttle settings to prevent detonation.

A valve that controls additional fuel flow in the economizer system, opening at high throttle settings.

An uncontrolled explosion in the combustion chamber, caused by excessively high heat.

The force that holds liquid molecules together, which can hinder fuel vaporization.

The process of a liquid turning into a gas.

The degree to which the throttle valve is open, controlling air flow.

A sealed compartment in the carburetor that holds fuel and maintains a constant level.

The pressure of the air surrounding us.