Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PPL - AGK > Induction System > Flashcards

Induction System Flashcards

1
Q

What is an induction system

A

Process of taking outside air and mixing it with fuel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How does air get into the induction system

A

AIR INTAKE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the filter used for

A

FILTER OUTSIDE AIR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the ideal fuel to air ratio

A

1:12
1 part fuel, 12 parts air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the 2 types of mixer used in an induction system

methods of getting fuel and air into the cylinder

A
  1. Carburettor
  2. Injection System
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How does a carburettor suck fuel into the mixer

A

VENTURI EFFECT

Pressure drop occurs
Fuel sucked into airflow from discharge nozzle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Fuel is sucked into the mixer through what component of the engine

A

DISCHARGE NOZZLE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the name given to the space that holds a small reservoir of fuel that is kept at a constant level inside of the engine

A

FLOAT CHAMBER

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

At what level is the air pressure in a float chamer normally at

A

ATMOSPHERIC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is significant about pressure that allows fuel to be forced from the float chamber to the discharge nozzle

A

Atmospheric Pressure > Venturi Pressure

Greater pressure in the float chamber pushes fuel down the pipe towards the discharge nozzle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Opening the throttle more results in MORE or LESS RPM

A

MORE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

When the throttle is closed, how is the engine kept running at idle

A

IDLE JET INLET

aka Slow Running Jet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

When a throttle is opened quickly, what device forces fuel into the Venturi to compensate for the sudden increase of airflow

A

ACCELERATOR PUMP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

At high power settings, why is mixture designed to be more fuel rich

A

EXCESS FUEL ACTS AS COOLANT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why is mixture contorl important at altitude

A

LESS DENSE AIR

Less dense air means less efficient burning of mixture
Less dense air means more fuel to air parts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

At altitude, the mixture becomes MORE or LESS rich
Why

A
  1. MORE
  2. LESS DENSE AIR = LESS AIR PARTS TO FUEL
17
Q

At high altitudes, if mixture is left rich, what is the typical ratio

A

1:8

18
Q

Above what altitude sjhould mixture control typically be used

A

3000 ft

19
Q

when typically should the engine be leaned

A

CRUISE

20
Q

When only an RPM gauge available, what are the 4 steps to mixture leaning

A
  1. Note RPM
  2. Lean mixture until RPM peaks then drops
  3. Enrich mixture until RPM peaks
  4. Enrich mixture slightly more to maintain rich side peak
21
Q

When EGT gauge is available, what are the 3 steps to mixture leaning

A
  1. Lean mixture until EGT reaches peak and starts to fall
  2. Richen mixture until EGT peaks
  3. Richen mixture until EGT falls
22
Q

What are 5 results of too rich mixture

A
  1. Inefficient burn (cooler)
  2. Reduced RPM
  3. Engine runs cooler
  4. Spark Plug Fouling
  5. Mixture incombustible
23
Q

What are 5 results of too lean mixture

A
  1. Inefficient burn (hotter)
  2. Reduced RPM
  3. Engine runs hotter
  4. Pre-ignition or Detonation
  5. Engine damage
24
Q

What is the approximate air temperature drop within the venturi

A

25℃ to 30℃

25
Q

What is the dominant factor of carburettor icing

A

HUMIDITY

26
Q

What are 4 key symptoms of carb icing

1 answer for fixed prop, 1 for variable

A
  1. Decreasing RPM (fixed pitch prop)
  2. Decreasing Manifold Pressure (CSU prop)
  3. Rough Running
  4. Engine Failure
27
Q

How is warm air introduced into the carburettor to de-ice

A

CARB HEAT CONTROL

28
Q

What is the name for;

Icing formed from moist air hitting the cold air intake surface

A

IMPACT ICING

29
Q

6 advantages of a fuel injection system

A
  1. Reduced Evaporative Icing
  2. Fuel Flow
  3. Throttle Response
  4. Mixture Control
  5. Fuel Distribution
  6. Cold Weather Starts
30
Q

3 disadvantages of a fuel injection system

A
  1. Difficult hot engine start
  2. Vapour Lock
  3. Difficult engine restart after fuel starvation
31
Q

2 methods of priming an engine

A
  1. Cockpit Primer Control
  2. Throttle Priming

PPL - AGK (20 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions