Exam 2 Questions Flashcards
Flashpoint
Temperature to which oil must be cooled in order to not leave carbon deposits or ash in the cylinder.
Fire Point
Temperature to which oil must be heated to burn continuously.
A “high viscosity” oil will ________.
Be heavy, slow flowing oil
Match the viscosity with the intended use. (Year round, warm weather, cold weather)
Multi-viscosity
High Viscosity
Low Viscosity
Multi-viscosity (Year Round)
High Viscosity (Warmer Weather)
Low Viscosity (Cold Weather)
The lowest temperature at which oil will freely flow is the ______.
Pour Point
The primary characteristic of aviation oil that prevents oxidation and rust is _________.
Chemical Stability
Select from the list below, which items are a function of oil lubrication.
Sealant
Coolant
Buffer between parts
Lubricant
Oxidizer
Combustion Aide
Cleanser
Correct:
Sealant
Coolant
Buffer between parts
Lubricant
Cleanser
Which type of oil is typically used in reciprocating engine aircraft?
Ashless Dispersant
Select all the parts of a complete induction system
Intercooler
Air Scoop
Intake Manifold and pipes
Exhaust Manifold
Injectors
Carburetor or Air Control Unit
Air Scoop
Intake Manifold and pipes
Carburetor or Air Control Unit
This component sends the fuel/air mixture into the cylinders
Intake Manifold
In a normally aspirated engine, MAP is less than outside pressure because of the ________ created in the air induction system.
low pressure
A leak in the intake manifold will be the most noticeable at ______ engine RPM
Low
___________ would happen if the carburetor heat were turned on during high-power operation for a prolonged period of time.
Detonation
Superchargers allow _________-.
Maximum horsepower at high altitudes
A supercharger that does not use exhaust gases to turn it’s impeller is a ___________ and compresses the _____________.
Internal supercharger and Fuel/Air mixture together
An aircraft engine is considered supercharged when the MAP is over ____________.
30 inches
What instrument indication will be observed when carburetor ice forms in an engine equipped with a constant-speed propeller
MAP
The capacity of a supercharger depends on the ______ and the _________.
speed the impeller spins; size of the impeller
Match the component to it’s description. (Contains a vapor ejector; Fuel injection component instead of a carburetor; Where air is mixed with fuel; Held closed with a spring)
Fuel injection pump
Fuel-Air Control Unit
Fuel discharge nozzle
Fuel Manifold Valve
Fuel injection pump (Contains a vapor ejector)
Fuel-Air Control Unit (Fuel injection component instead of a carburetor)
Fuel discharge nozzle (Where air is mixed with fuel)
Fuel Manifold Valve (held closed with a spring)
Turbochargers depend on the amount of _________ to determine their boost
Exhaust gases
Fuel injected engines can be hard to start when they are hot and/or just shut down. T or F?
True
When the mixture of an aircraft engine is leaned the Exhaust Gas Temperature lowers. T or F?
False
The manifold absolute pressure is the pressure in or at the _________.
Intake Manifold
Select the item that fits this definition: “the maximum altitude at which engine can operate at 100% capacity)
Critical Altitude
________ refers to how readily the liquid fuel forms a vapor.
Volatility
The more volatile a fuel is the more _________ it will take form the air during vaporization.
Heat
The Octane number of a fuel determines its _________ value.
Antiknock
The 2 principle factors governing what grade of fuel is used in aircraft are?
Compression ratio; MAP
Select from the list of things that will cause vapor lock
Low atmospheric pressure
Excessive Fuel temperatures
Sloshing of the Fuel due to turbulence
How does the spark generated in the magneto get to the spark plug?
Distributor block and distributor
The component in a propeller governor that ultimately controls the flow of oil to the propeller hub and from the hub is?
Pilot valve
This component of a propeller governor determines the position of the pilot valve
fly weights
In a single-engine aircraft propeller governor, more oil pressure equals
More pitch/ less RPMs
Oil pressure for a propeller governor comes from the _________-?
Internal Oil Pump
Feather of a propeller is _________?
Flat pitch to reduce drag of a failed engine propeller disk
