Exam 2 Questions

Question 1

Flashpoint

Answer 1

Temperature to which oil must be cooled in order to not leave carbon deposits or ash in the cylinder.

Question 2

Fire Point

Answer 2

Temperature to which oil must be heated to burn continuously.

Question 3

A “high viscosity” oil will ________.

Answer 3

Be heavy, slow flowing oil

Question 4

Match the viscosity with the intended use. (Year round, warm weather, cold weather)

Multi-viscosity
High Viscosity
Low Viscosity

Answer 4

Multi-viscosity (Year Round)
High Viscosity (Warmer Weather)
Low Viscosity (Cold Weather)

Question 5

The lowest temperature at which oil will freely flow is the ______.

Answer 5

Pour Point

Question 6

The primary characteristic of aviation oil that prevents oxidation and rust is _________.

Answer 6

Chemical Stability

Question 7

Select from the list below, which items are a function of oil lubrication.

Sealant
Coolant
Buffer between parts
Lubricant
Oxidizer
Combustion Aide
Cleanser

Answer 7

Correct:
Sealant
Coolant
Buffer between parts
Lubricant
Cleanser

Question 8

Which type of oil is typically used in reciprocating engine aircraft?

Answer 8

Ashless Dispersant

Question 9

Select all the parts of a complete induction system

Intercooler
Air Scoop
Intake Manifold and pipes
Exhaust Manifold
Injectors
Carburetor or Air Control Unit

Answer 9

Air Scoop
Intake Manifold and pipes
Carburetor or Air Control Unit

Question 10

This component sends the fuel/air mixture into the cylinders

Answer 10

Intake Manifold

Question 11

In a normally aspirated engine, MAP is less than outside pressure because of the ________ created in the air induction system.

Answer 11

low pressure

Question 12

A leak in the intake manifold will be the most noticeable at ______ engine RPM

Answer 12

Low

Question 13

___________ would happen if the carburetor heat were turned on during high-power operation for a prolonged period of time.

Answer 13

Detonation

Question 14

Superchargers allow _________-.

Answer 14

Maximum horsepower at high altitudes

Question 15

A supercharger that does not use exhaust gases to turn it’s impeller is a ___________ and compresses the _____________.

Answer 15

Internal supercharger and Fuel/Air mixture together

Question 16

An aircraft engine is considered supercharged when the MAP is over ____________.

Answer 16

30 inches

Question 17

What instrument indication will be observed when carburetor ice forms in an engine equipped with a constant-speed propeller

Answer 17

MAP

Question 18

The capacity of a supercharger depends on the ______ and the _________.

Answer 18

speed the impeller spins; size of the impeller

Question 19

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

Answer 19

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)

Question 20

Turbochargers depend on the amount of _________ to determine their boost

Answer 20

Exhaust gases

Question 21

Fuel injected engines can be hard to start when they are hot and/or just shut down. T or F?

Answer 21

True

Question 22

When the mixture of an aircraft engine is leaned the Exhaust Gas Temperature lowers. T or F?

Answer 22

False

Question 23

The manifold absolute pressure is the pressure in or at the _________.

Answer 23

Intake Manifold

Question 24

Select the item that fits this definition: “the maximum altitude at which engine can operate at 100% capacity)

Answer 24

Critical Altitude

Question 25

________ refers to how readily the liquid fuel forms a vapor.

Answer 25

Volatility

Question 26

The more volatile a fuel is the more _________ it will take form the air during vaporization.

Answer 26

Heat

Question 27

The Octane number of a fuel determines its _________ value.

Answer 27

Antiknock

Question 28

The 2 principle factors governing what grade of fuel is used in aircraft are?

Answer 28

Compression ratio; MAP

Question 29

Select from the list of things that will cause vapor lock

Answer 29

Low atmospheric pressure
Excessive Fuel temperatures
Sloshing of the Fuel due to turbulence

Question 30

How does the spark generated in the magneto get to the spark plug?

Answer 30

Distributor block and distributor

Question 31

The component in a propeller governor that ultimately controls the flow of oil to the propeller hub and from the hub is?

Answer 31

Pilot valve

Question 32

This component of a propeller governor determines the position of the pilot valve

Answer 32

fly weights

Question 33

In a single-engine aircraft propeller governor, more oil pressure equals

Answer 33

More pitch/ less RPMs

Question 34

Oil pressure for a propeller governor comes from the _________-?

Answer 34

Internal Oil Pump

Question 35

Feather of a propeller is _________?

Answer 35

Flat pitch to reduce drag of a failed engine propeller disk