Powerplant Fuel Metering 1

The __ valve on the Continental fuel pump allows the boost/auxiliary pump to supply fuel to the engine if the engine pump is inop.

Bypass

The fuel injection pump used on Continental fuel injection systems is a ____ displacement ___ type pump

Constant Vane

THe throttle valve controls the ____ passing thru the carb and into the cylinders

Fuel

When adjusting idle ___ you are adjusting the amount of fuel allowed to pass out of the idle discharge nozzles

Mixture

The _____ system is used to supply a momentary burst of fuel during rapid throttle movements to help prevent an overly lean condition from occurring.

Accelerator- attached to throttle

To lean the air fuel mixture the pilot must move the mixture control lever ___ from the full rich position toward the idle cut-off postion.

Aft

In a pressure carb the regulator section operated off of the __ metering force working in conjunction with the __ metering force

Air Fuel

THe ___ helps to reduce surface tension of the fuel to aid in fuel atomization/vaporization and also helps ___ the amount of fuel pulled from the float bowl.

AirBleed Control

The _____ mixture control compensates for changes in altitude by maintaining the air fuel mixture to a ratio set by the pilot

Automatic

THe ___ - ___ mixture control changes fuel flow to the engine by changing the air pressure acting on the fuel in the float bowl.

Back- Pressure

THe main principle of operation for the venturi is Principle

Bernoulli's

An A & P mechanic __ overhaul a float carb

Can

An A&P mechanic ____ overhaul a pressure carb or fuel injection

Cannot

The Bendix and Continental fuel injection systems both have a ____ fuel flow which is injected into the ___ of each cylinder.

Continous Intake

THe venturi works to measure the airflow entering the engine according to the pressure ___ that occurs with an increase air volume and an ____ air velocity

Decrease Increase

Power Enrichment=

Economizer

The Best ____ mixture has an air:fuel ratio of ___:1 and will give the greatest range to the a/c

Economy 14:1

To lean the fuel air mixture on a pressure carb the pressure carb the pressure difference between chambers A and B will ___

Equalize

The _____ and ____ valve control the fuel level in the float chamber for a float type carburetor.

Float and Needle

THe __ ____ valve on a fuel injection system divides the fuel evenly to all of the cylinders

Flow Divider

The ___ ____ position of the mixture control allows for maximum fuel flow to the engine for a given power setting

Full Rich

The ____ ___ position of the mixture control allows for the engine to quit running after the fuel in the carburetor/fuel injector has been burned off.

Idle Cut-Off

At idle speeds fuel exits out the ___ ____ ports located on the engine side of the throttle valve which separate from the normal discharge nozzle on a float carb.

Idle Discharge

Chamber A Contains

Impact Air

If the float bowl vent becomes obstructed the mixture would become progressively more __ until the engine quits runnning

Lean

If the main air bleed becomes enlarged the fuel air ratio will become ___

Lean

If the fuel air mixture is too ____ possible problems are ____-firing thru the carburetor and detonation and pre-ignition due to excess engine temps

Lean BackFiring

If the fuel level is too ____ for a float carburetor, the air fuel mixture will be too lean causing ____ -firing

Lean BackFiring

When the engine is at idle RPM there will be a very ___ pressure on the engine side of the throttle valve

Low

THe _____ pressure area at the waist/throat pf the venturi causes fuel to be drawn from the discharge nozzle for a ___ type carburetor

Low Float

For turbocharged and supercharged engines upper deck pressures from the turbocharger outlet is routed to the ___ of the fuel nozzle

Maniflod or Shroud

The _____ ____ for any carburetor or fuel injection system limits the maximum fuel flow to the engine above idle speeds and with the mixture control in full rich position.

Metering Jet

THe greater the pressure differnce between chambers A and B the ___ fuel will flow to the engine

More

When the Mixture control lever is in the idle cut-off position there will be a ___ air pressure, normally from the venturi, acting on the fuel in the float bowl for a carb with a back suction type mixture control

Negative

At overhaul for a float carburetor the fuel level is going to be checked. the measurement should be made from the fuel level to the ____ ___ of the carb

Parting Surface

When the mixture control lever is in the full rich position there will be ___ air pressure acting on the fuel in the float bowl on a carb equipped with a back suction type mixture control

Positive

The best ____ mixture has an air:fuel ratio of ___:1 and will give the most horsepower output for the engine.

Power 12:1

THe ____ ____ or economizer system provides extra fuel to the engine at high pwr settings to aid in cooling of the engine.

Power Enrichment

Chamber D contains ___ pressure

Regulated fuel

As the a/c goes up in the air:fuel ratio becomes

Rich

If the float were to sink to the bottom of the float bowl or the float needle valve did not seal properly when closed, this would cause the fuel air ratio to become extremely ____

Rich

If the main air bleed becomes obstructed the fuel air ratio will become ___

Rich

If the fuel level is too _____ for a float carburetor, the air fuel mixture will be too rich causing ___-firing

Rich AfterFiring

If a fuel nozzle becomes plugged for a fuel injected engine the remaining cylinders will run ___ and the fuel flow gage will show an ___ in fuel flow

Rich Increase

If the fuel air mixture is too ___ possible problems are ____-firing thru the exhaust and excessive carbon/lead buildup due to low engine temps

Rich AfterFiring

A pressure carburetor should be fuel ___ for 24 hours after installation and prior to run up to help the diaphragms reach their original pliability.

Soaked

When adjusting the idle _____ you are adjusting how far open or closed the throttle valve is at low RPM

Speed

The acceleration pump used on pressure carbs uses __ tension to discharge fuel into the engine once the throttle valve is opened up.

Spring Tension

The_____ mixture has an air:fuel ratio of ___:1 and is the theoretic mixture where all oxygen and fuel are used during combustion.

Stoichiometric 15:1

If the pressure between Chambers A and B are equalized the fuel flow to the engine will ___

Stop

THe vapor chamber on a continental fuel pump allows for fuel vapors to be taken back to the ____

Tank

The acceleration pump used on float carburetors is actuated by the ___ lever in the cockpit

Throttle

The most common type of carburetor, in relations to the airflow thru the carburetor, is the _____ carburetor

Updraft

The vent in the top of the float bowl on a float type carburetor aid in the removal of any ____ and ensures there is a positive ____ pressure acting on the fuel in the float bowl

Vacuum Air

THe __ ___ mixture consists of a valve located between the float bowl and the discharge nozzle to control the fuel flow to the engine

Variable Orfice

Chamber B contains

Venturi Air