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