Fuel

Question 1

What is fuel metering?

Answer 1

Is the adjustment of the fuel input based on the air intake

Question 2

What are the standard mixture ratios?

Answer 2

Rich = 8:1

Lean = 16:1

Question 3

What does the float device do?

Answer 3

Controls the level of fuel in the float bowl

Question 4

__________ _________ _____________ is more useful for acrobatic fighter airplanes

Question 5

______ _________ _________ is used to eliminate the drawbacks of carburetors

Answer 5

Fuel Injection System

Question 6

Fuel ______/_____ provides provision for draining/sampling

Answer 6

Strainer/bowl

Question 7

On the mixture control, how do you achieve full rich and full idle?

Answer 7

Full Rich-Push Forward on Knob

Idle Cutoff-Pull mixture control aft

Question 8

As aircraft climbs, you heve to ______ mixture

Answer 8

Lean

Question 9

_________ = Uncontrolled combustion, usually caused by using fuel with too low octane

Answer 9

Detonation

Question 10

Hot spots cause ____ - ________

Answer 10

Pre-Ignition

Question 11

__________: Ignition of fuel inside the induction system caused by very lean mixture burning

Answer 11

Backfire

Question 12

___________ is caused by unburned fuel mixing with air in exhaust and reigniting, usually a sign of excessively rich mixture

Answer 12

Afterfire

Question 13

The _____ _______ is known as a last chance fuel filter

Answer 13

Inlet Screen

Question 14

_____ & ______ _______ opens and closes to allow or stop fuel into float bowl

Answer 14

Seat & Needle Valve

Question 15

During Idle, sometimes the venturi effect isn’t strong enough, and relies on ______ _________. There are also holes upstream used to add fuel to the engine

Answer 15

Engine Suction

Question 16

In automatic mixture control, ______ _________ reacts to atmospheric air pressure changes to drive the ________ ________

Answer 16

Sealed Bellows, Variable Orafice

Question 17

__________ _______ is used during rapid engine acceleration, preventing mixture from leaning out as the venturi effect catches up

Answer 17

Accelerator pump

Question 18

______ ________ _________ represrents the air pressure above the surface of the fuel required to prevent evaporation

Answer 18

Reid Vapour Pressure

Question 19

To promote a fine spray pattern, a ________ _____ _______ is installed beside the main discharge nozzle and below the fuel level in the float bowl to break surface tension

Answer 19

Metered Air Bleed

Question 20

Carburetor is limited to: _______ and ______ _____

Answer 20

Weather, Carb Ice

Question 21

R Question: Where in the carb does the discharge nozzle sit?

Answer 21

In the thinnest point of the venturi

Question 22

R Question: How do we shut the engine off?

Answer 22

Starve engine of fuel (Mixture to idle cutoff)

Question 23

R Question: How do mags assist on startup?

Answer 23

Through the use of Impulse couplers

Question 24

Low operating pressures can result in _________ __________ of fuel

Answer 24

incomplete vaporization

Question 25

What type of pump do we use on the Continental Fuel Injection system?

Answer 25

Constant Displacement Vane Pump

Question 26

T or F: A Pressure Injection Carb (Pressure Carb) doesn’t have a float bowl

Answer 26

True

Question 27

Subsystems of Carburetor system:

Answer 27

Metering System

Mixture System: Automatic or Manual

Idle Valve

Accelerator Pump

Power Enrichment

Question 28

_____ _______ __________ changes the throttle valve position at idle

Answer 28

Idle Speed Adjustment

Question 29

______ ___________ ___________ changes the amount of fuel that enters the cylinders at idle

Answer 29

Idle Mixture Adjustment

Question 30

When rigging engine controls, make sure that the control is at either extreme.

Question 31

After installing the carb, there’s three independant control checks: _____ _____

• _______*
• __________*

Answer 31

Carb Heat

Mixture

Throttle

Checking for Bounce, Assembly/Installation, Orientation

Question 32

What does the first number mean in 10W30?

Answer 32

Viscosity at low temperature

Question 33

What does the last number mean in 10W30?

Answer 33

Viscosity at Operating Temperature

Question 34

What does the ‘W’ mean in 10W30?

Answer 34

Winter grade

Question 35

What if the ‘W’ is at the front?

Answer 35

Ashless Dispersent oil