AVIA 1065 Carburetor Systems Quiz

<p>It decreases as atmospheric pressure decreases. (D)</p> Signup and view all the answers

<p>It is half as dense as at sea level. (C)</p> Signup and view all the answers

<p>It allows for a constant fuel flow regardless of altitude. (D)</p> Signup and view all the answers

<p>Needle type and back-suction type controls. (A)</p> Signup and view all the answers

<p>It becomes richer, potentially leading to engine issues. (B)</p> Signup and view all the answers

<p>To ensure the mixture remains optimal for combustion despite air density changes. (B)</p> Signup and view all the answers

<p>To provide fuel to the engine at speeds above idling (B)</p> Signup and view all the answers

<p>It allows for fuel delivery at very low engine speeds (B)</p> Signup and view all the answers

<p>To introduce fuel quickly during sudden throttle openings (A)</p> Signup and view all the answers

<p>Slow response of the main metering system (B)</p> Signup and view all the answers

<p>Accelerating system (B)</p> Signup and view all the answers

<p>It stops fuel delivery when the engine is not running (B)</p> Signup and view all the answers

<p>It is determined by the level of pressure drop in the venturi throat (C)</p> Signup and view all the answers

<p>When the throttle is nearly closed at low engine speeds (C)</p> Signup and view all the answers

<p>The fuel-air mixture will momentarily reduce (A)</p> Signup and view all the answers

<p>It provides additional fuel during high power demands (C)</p> Signup and view all the answers

<p>Decreases the pressure at the discharge nozzle (A)</p> Signup and view all the answers

<p>Throttle valve (B)</p> Signup and view all the answers

<p>Controls the fuel flow when the throttle valve is wide open (B)</p> Signup and view all the answers

<p>It provides a consistent fuel supply to the discharge nozzle. (D)</p> Signup and view all the answers

<p>Poor engine performance at wide open throttle (D)</p> Signup and view all the answers

<p>Floating mechanism dropping due to lack of fuel (A)</p> Signup and view all the answers

<p>It closes to stop the fuel flow (B)</p> Signup and view all the answers

<p>It assumes an intermediate position based on fuel demand (A)</p> Signup and view all the answers

<p>Through the air velocity in the carburetor venturi (B)</p> Signup and view all the answers

<p>It forces the fuel out through the discharge nozzle (D)</p> Signup and view all the answers

<p>A vent or small opening (C)</p> Signup and view all the answers

<p>To supply fuel at all speeds above idling (A)</p> Signup and view all the answers

<p>The float drops, opening the needle valve (B)</p> Signup and view all the answers

<p>It regulates the fuel flow to the nozzle. (C)</p> Signup and view all the answers

<p>It cuts off the fuel supply completely. (C)</p> Signup and view all the answers

<p>It automatically adjusts the mixture during high power operation. (D)</p> Signup and view all the answers

<p>An unsafe combustible mixture could still enter the combustion chamber. (D)</p> Signup and view all the answers

<p>They have a tendency to form ice at low pressure. (A)</p> Signup and view all the answers

<p>Open the throttle wide. (B)</p> Signup and view all the answers

<p>At a pressure above atmospheric pressure. (D)</p> Signup and view all the answers

<p>Power enrichment system. (A)</p> Signup and view all the answers

<p>To regulate fuel flow according to pilot input. (D)</p> Signup and view all the answers

<p>A rich mixture is necessary for maximum power and cooling. (A)</p> Signup and view all the answers

<p>Pressure-type carburetors discharge fuel at a pressure well above atmospheric. (B)</p> Signup and view all the answers

<p>Float action can become disrupted. (D)</p> Signup and view all the answers

<p>They can ignite in the exhaust manifold. (B)</p> Signup and view all the answers

<p>Limits the airflow at full throttle (A)</p> Signup and view all the answers

<p>It increases (D)</p> Signup and view all the answers

<p>To limit fuel flow at wide-open throttle (D)</p> Signup and view all the answers

<p>It decreases fuel density and enhances vaporization (C)</p> Signup and view all the answers

<p>At approximately 60-70 percent of rated power (A)</p> Signup and view all the answers

<p>To create a flow from atmospheric pressure to a low pressure area (B)</p> Signup and view all the answers

<p>Fuel delivery decreases due to metering force reduction (D)</p> Signup and view all the answers

<p>By controlling flow and enhancing combustion (D)</p> Signup and view all the answers

<p>The metering force at low pressure (B)</p> Signup and view all the answers

<p>To open further as the throttle opens for additional fuel flow (D)</p> Signup and view all the answers

<p>To create an ideal mixing environment for vaporization (A)</p> Signup and view all the answers

<p>It creates larger fuel drops instead of a fine spray (B)</p> Signup and view all the answers

<p>0.5 'Hg (D)</p> Signup and view all the answers

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.