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Airframes > Exam Review: AVIATION FUEL > Flashcards

Exam Review: AVIATION FUEL Flashcards

1
Q

What are the 2 types of Aviation Fuel?

A

AVGAS

JET FUEL

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2
Q

Heavy hydrocarbons make what?

A

JET FUEL

DIESEL

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3
Q

Where do we use AVGAS?

A

Piston engines

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4
Q

Which fuel is more VOLATILE and FLAMMABLE?

A

AVGAS

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5
Q

The tendency of a liquid to turn into a vapor is called what?

A

VOLATILITY

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6
Q

How does VAPORIZATION increase?

A

pressure decrease

temperature increase

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7
Q

How do we measure the volatility of the fuel?

A

REID VAPOUR PRESSURE TESTER

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8
Q

What are the 3 problems with AVGAS?

A

VAPOR LOCK
CARB ICING
DETONATION

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9
Q

Fuel vaporization before the air stream is called what?

A

VAPOUR LOCK

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10
Q

How does VAPOUR LOCK occur?

A

Low fuel pressure
high fuel temp
excessive fuel turbulence

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11
Q

How do we prevent VAPOUR LOCK?

A

Less heat, sharp bends, steep rises
BOOST PUMPS
VAPOUR ELIMINATOR

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12
Q

This problem mostly occurs in the venturi throat or throttle valve and is related to vapourization

A

CARB ICING

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13
Q

CARB ICING causes what?

A

Loss of power

engine stoppage

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14
Q

How do we prevent CARB ICING?

A

Carb heat

Air inlet heat

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15
Q

What is DETONATION?

A

Detonation of fuel due to high pressure and temperature prior to ignition

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16
Q

What will indicate DETONATION?

A

Knock
CHT temp rise
Engine power loss

17
Q

How do we prevent DETONATION?

A

Increase OCTANE RATING

18
Q

How do we increase the OCTANE RATING?

A

Add TETRAETHYL LEAD

19
Q

What are the 3 grades of AVGAS and what are their colours?

A

80/87 Red
100/130 Green
100LL Blue

20
Q

The first number 100/130 indicates what?

A

Lean mixture (burns hotter)

21
Q

What are the 3 types of TURBINE FUELS?

A

JET A
JET A1
JET B

22
Q

Which JET FUEL is a kerosene/gasoline blend?

A

JET B

23
Q

Which fuel would we need for cold starts and aerial restarts?

A

JET B (high volatility)

24
Q

What are the problems with TURBINE FUELS?

A

Water

Microorganisms

25
Q

What are the 2 types of water found in the fuel system?

A

Dissolved

Free (removable)

26
Q

What do we use HOT BLEED AIR and ENGINE OIL for?

A

Prevents ice crystals

27
Q

How do we prevent ALGAE and ice crystals?

A

ADDITIVES

Airframes (19 decks)

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