PP Fuel Metering Systems

What factor is not used in the operation of an aircraft gas turbine engine fuel control unit?

In order to stabilize cams, springs, and linkages within the fuel control, manufacturers generally recommend that all final turbine engine trim adjustments be made in the

When trimming a turbine engine, the fuel control is adjusted to

An electronic engine control (EEC) is a system that receives engine operating information and

A full-authority electronic engine control (EEC) is a system that receives all the necessary data for engine operation and

In a supervisory EEC system, any fault in the EEC that adversely affects engine operation

The active clearance control (ACC) portion of an EEC system aids turbine engine efficiency by

What should be checked/changed to ensure the validity of a turbine engine performance check if an alternate fuel is to be used?

Prior to performing engine trimming, you should

An aircraft should be facing into the wind when trimming an engine. However, if the velocity of the wind blowing into the intake is excessive, it is likely to cause a

Generally, the practice when trimming an engine is to

Which of the following best describes the function of an automatic mixture control (AMC)?

On a float-type carburetor, the purpose of the economizer valve is to

The fuel metering force of a conventional float-type carburetor in its normal operating range is the difference between the pressure acting on the discharge nozzle located within the venturi and the pressure

If the main air bleed of a float-type carburetor becomes clogged, the engine will run

Which method is commonly used to adjust the level of a float in a float-type carburetor?

What is the possible cause of an engine running rich at full throttle if it is equipped with a float-type carburetor?

One of the things a metering orifice in a main air bleed helps to accomplish (at a given altitude) in a carburetor is

A punctured float in a float-type carburetor will cause the fuel level to

The back-suction mixture control system operates by

If an aircraft engine is equipped with a carburetor that is not compensated for altitude and temperature variations, the fuel/air mixture will become

Float-type carburetors which are equipped with economizers are normally set for

If a float-type carburetor becomes flooded, the condition is most likely caused by

If an engine is equipped with a float-type carburetor and the engine runs excessively rich at full throttle, a possible cause of the trouble is a clogged

What occurs when a back-suction type mixture control is placed in IDLE CUTOFF?

Which of the following best describes the function of an altitude mixture control?

Select the correct statement concerning the idle system of a conventional float-type carburetor.

On an engine equipped with a pressure-type-carburetor, fuel supply in the idling range is ensured by the inclusion in the carburetor of

The economizer system of a float-type carburetor performs which of the following functions?

How will the mixture of an engine be affected if the bellows of the automatic mixture control (AMC) in a pressure carburetor ruptures while the engine is operating at altitude?

The fuel level within the float chamber of a properly adjusted float-type carburetor will be

The metered fuel pressure (chamber C) in an injection-type carburetor.

Select the statement which is correct relating to a fuel level check of a float-type carburetor.

What carburetor component measures the amount of air delivered to the engine?

If fuel is found running from the carburetor with the engine not running, the likely cause is that the

Fuel is discharged for idling speeds on a float-type carburetor.

When air passes through the venturi of a carburetor, what three changes occur?

Where is the throttle valve located on a float-type carburetor?

An aircraft carburetor is equipped with a mixture control in order to prevent the mixture from becoming too

Which of the following is NOT a function of the carburetor venturi?

Idle cutoff is accomplished on a carburetor equipped with a back-suction mixture control by

One purpose of an air bleed in a float-type carburetor is to

To determine the float level in a float-type carburetor, a measurement is usually made from the top of the fuel in the float chamber to the

The throttle valve of float-type aircraft carburetors is located

Why must a float-type carburetor supply a rich mixture during idle?

What component is used to ensure fuel delivery during periods of rapid-engine acceleration?

The device that controls the ratio of the fuel/air mixture to the cylinders is called a

The device that controls the volume of the fuel/air mixture to the cylinders is called a

Which statement is correct regarding a continuous-flow fuel injection system used on many reciprocating engines?

During the operation of an aircraft engine, the pressure drop in the carburetor venturi depends primarily upon the

Which of the following causes a single diaphragm accelerator pump to discharge fuel?

At what engine speed does the main metering jet actually function as a metering jet in a float-type carburetor?

An aircraft engine continuous cylinder fuel injection system normally discharges fuel during which stroke(s)?

What is the purpose of the carburetor accelerating system?

When troubleshooting an engine that will not idle, what would be a probable cause?

What is the relationship between the accelerating pump and the enrichment valve in a pressure injection carburetor?

What is the relationship between the pressure existing within the throat of a venturi and the velocity of the air passing through the venturi?

Which of the following is least likely to occur during operation of an engine equipped with a direct cylinder fuel injection system?

What carburetor component limits the maximum airflow into the engine at full throttle?

On a carburetor without an automatic mixture control as you ascend to altitude, the mixture will

During engine operation, if carburetor heat is applied, it will

The desired engine idle speed and mixture setting

A nine-cylinder radial engine, using a multiple-point priming system with a central spider, will prime which cylinders?

What is a function of the idling air bleed in a float-type carburetor?

If the volume of air passing through a carburetor venturi is reduced, the pressure at the venture throat will

Refer to Figure 6. Which curve most nearly represents an aircraft engine’s fuel/air ratio throughout its operating range?

What will occur if the vapor vent float in a pressure carburetor loses its buoyancy?

What method is ordinarily used to make idle speed adjustments on a float-type carburetor?

For what primary purpose is a turbine engine fuel control unit trimmed?

Which type of fuel control is used on most of today’s turbine engines?

Under which of the following conditions will the trimming of a turbine engine be most accurate?

(1) The mixture used at rated power in air cooled reciprocating engines is richer than the mixture used through the normal cruising range.

(2) The mixture used at idle in air cooled reciprocating engines is richer than the mixture used at rated power.

Regarding the above statements,

Under which of the following conditions would an engine run lean even though there is a normal amount of fuel present?

During the mixture adjustments, which of the following is normally observed to determine when the correct mixture has been achieved?

An indication that the optimum idle mixture has been obtained occurs when the mixture control is moved to IDLE CUTOFF and manifold pressure.

The use of less than normal throttle opening during starting will cause

When checking the idle mixture on a carburetor, the engine should be idling normally, then pull the mixture control toward the IDLE CUTOFF position. A correct idling mixture will be indicated by

When a new carburetor is installed on an engine,

The purpose of the back-suction mixture control in a float-type carburetor is to adjust the mixture by

Reciprocating engine power will be decreased at all altitudes if the

If the idling jet becomes clogged in a float-type carburetor, the

An aircraft engine equipped with a pressure-type carburetor is started with the

One of the best ways to increase engine power and control detonation and preignition is to

An excessively lean fuel/air mixture may cause

The density of air is very important when mixing fuel and air to obtain a correct fuel-to-air ratio. Which of the following weighs the most?

A mixture ratio of 11:1 normally refers to

The economizer system in a float-type carburetor

A carburetor is prevented from leaning out during quick acceleration by the

In turbine engines that utilize a pressurization and dump valve, the dump portion of the valve

What effect does high atmospheric humidity have on the operation of a jet engine?

What are the positions of the pressurization valve and the dump valve in a jet engine fuel system when the engine is shut down?

What could cause a lean mixture and high cylinder head temperature at sea level or low altitudes?

Which of the following is NOT an input parameter for a turbine engine fuel control unit?

Detonation occurs when the fuel/air mixture

What corrective action should be taken when a carburetor is found to be leaking fuel from the discharge nozzle?

A major difference between the Teledyne-Continental and RSA (Precision Airmotive or Bendix) continuous flow fuel injection systems in fuel metering is that the

The function of the altitude compensating, or aneroid valve used with the Teledyne-Continental fuel injections system on many turbocharged engines is to

The primary purpose of the air bleed openings used with continuous flow fuel injector nozzles is to