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Private Pilot Ground Course > Aircraft Systems Pt. 2 > Flashcards

Aircraft Systems Pt. 2 Flashcards

1
Q

This provides a spark that ignites the fuel-air mixture in the cylinders

A

Ignition System

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2
Q

What is an ignition system made out of?

A

Magnetos, spark plugs, high-tension leads, and an ignition switch

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3
Q

These are designed with two independent ignition systems.

A

Aircraft piston engines

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4
Q

Aircraft piston engines are made up of _______________________ and a _______________________

A

two aircraft spark plugs per cylinder, left and right aircraft magneto

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5
Q

This is an engine driven electrical generator that uses permanent magnets and coils to produce high voltage to fire the aircraft spark plugs.

A

Magnetos

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6
Q

It generates sufficiently high voltage to jump a spark across the spark plug gap in each cylinder

A

Magnetos

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7
Q

When does the magnetos start?

A

When the starter is engaged and the crankshaft begins to turn

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8
Q

State the five positions in an ignition switch

A
  • OFF
  • R (Right)
  • L (Left)
  • BOTH
  • START
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9
Q

Checking if magnetos are working:

-Switch between “R” and “L” and observe a drop in RPM
-RPM drop should _______________________ on either magneto or ___________________ between magnetos

A

should not exceed 125 RPM, 50 RPM differential

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10
Q

These are responsible for delivering electric current from the ignition system to the combustion chamber

A

Spark plugs

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11
Q

This is used to ignite the fuel mixture

A

Current

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12
Q

This is generated by the aircraft magneto and is conducted through the ignition harness to the spark plug, where it is used to ignite the fuel in the cylinders while containing combustion pressure within the engine

A

Electricity

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13
Q

Spark plug failing results from the __________________ in aviation fuel?

A

Tetraethyl lead (TEL)

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14
Q

The fouling arises when low engine operating temperature are coupled with _____________________. Doing this prevents the ______________________________.

A

running a rich mixture, complete vaporization of TEL

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15
Q

This is designed to provide an uninterrupted flow of clean fuel from the fuel tanks to the engine.

A

Fuel System

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16
Q

State the two common classifications apply to fuel systems in small aircraft

A

Gravity-feed and fuel-pump systems

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17
Q

State the four fuel system components

A
  • Fuel Primer
  • Fuel Selectors
  • Fuel Quantity Gauges
    -Fuel Tanks
18
Q

This utilizes the force of gravity to transfer through fuel from the tanks to the engine

A

Gravity-Feed system

19
Q

The fuel tanks in the wings are located below the carburetor, thus requiring a pump

A

Fuel pump system

20
Q

State the fuel-pump system’s fuel pumps

A
  • An engine-driven main fuel pump
  • An electrically-driven auxiliary pump provided for use in engine starting and in the event the engine pump fails
21
Q

A hand-operated piston type. It is mounted in the instrument panel and extends through the firewall where fuel intake and delivery lines are attached to the fittings on the left

A

Fuel Primer

22
Q

This is used to draw fuel from the tanks to vaporize fuel directly into the cylinders prior to starting the engine

A

Fuel Primer

23
Q

This allows selection of fuel from various tanks

A

Fuel Selection

24
Q

State the four positions for a common type of selector

A

LEFT , RIGHT, BOTH, OFF

25
Q

This indicate the amount of fuel measured by a sensing unit in each fuel tank and is displayed in gallons or pounds

A

Fuel Quantity Gauges

26
Q

This is normally located inside the wings of an airplane, have a filler opening on top of the wing through which they can filled. A filler cap covers this opening.

A

Fuel Tanks

27
Q

This may stand alone or be co-located with the fuel-tank vent and it allows the fuel to expand with increases in temperature without damage to the tank itself

A

Overflow drain

28
Q

This is identified by an octane or performance (grade)

A

Aviation Gasoline (AVGAS)

29
Q

True or False. The higher the grade of gasoline, the less pressure the fuel can withstand without detonating.

A

False. More pressure.

30
Q

True or False. Lower grades of fuel are used in lower-compression engines because these fuels ignite at a lower temperature.

A

True

31
Q

True or False. Higher grades are used in higher-compression engines because these fuels ignite at higher temperature, but not prematurely

A

True

32
Q

How is the fuel for aircraft with turbine engines classified as?

A

JET A, JET A-1, and JET B

33
Q

What does LL stand for?

A

Low Lead

34
Q

How is AVGAS used for aircraft with reciprocating engine classified as?

A

AVGAS 80, 100, and 100LL

35
Q

State the fuel related problems

A
  • Pre-ignition
  • Detonation
  • Vapor Lock
  • Fuel Contamination
36
Q

This occurs when the fuel-air mixture ignites prior to the engine’s normal ignition event

A

Pre - ignition

37
Q

The ignition source can be caused by a what? Either a cracked spark plug tip, carbon or lead deposits in the combustion chamber, or a burned exhaust valve, anything that can act as a glow plug to ignite the charge prematurely

A

Hot Spot

38
Q

This is an uncontrolled, explosive ignition of the fuel-air mixture within the cylinder’s combustion chamber

A

Detonation

39
Q

The fuel and air mixture “explodes” rather than burning smoothly. Because of this explosion, it exerts a much higher force on the piston and cylinder, leading to increased noise, vibration, and cylinder head temperatures.

A

Detonation

40
Q

State proper preflight practices

A
  • Take fuel samples from the fuel sumps as directed by your POH and/or checklist
  • Carefully observe each fuel sample and check for clarity, foreign objects, and color.
  • Visually check the fuel level in the tanks and dont just rely on the fuel gauges
  • If you need to add fuel to one or more tanks before the flight, take additional samples of fuel from all sumps after the fuel is added

Private Pilot Ground Course (18 decks)

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