M6.11 Electrics Flashcards

1
Q

What is a cable/wire

A

an isolated single solid conductor, or stranded conductor, surrounded by insulation

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

What are cables normally made of

A

Copper or aluminium

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

What are the advatantages of aluminium wires

A

Lightweight
Cheaper

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

What are the advantages of copper wires

A

Copper can hold a higher current
Aluminium wires cannot go below 8 AWG else they become brittle and crystallise

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

What are the two essential things that a wire has to be

A

Reliable
Carry a specific load

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is wet arc tracking

A

assessing the resistance to failure of cables when contaminated
Hence why cables lay above pipes that contain fluid

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

How does fluid contamination effect wires

A

Corrodes the insulation working it’s way to the conductor, slowly working its way up the whole cable

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

What does AWG mean and how does it work

A

American wire gauge (diameter of the cable)
The bigger the number the smaller the cable
Largest = 0AWG

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

What do we assume that a wires resistance is

A

0

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

What happens to the resistance if you increase the wire diameter

A

Resistance decreases

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

What happens to resistance if you increase the length of a wire

A

Resistance increases

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

What do the last two digits mean on a cable rating identification

A

The size (AWG)
Copper - AN-10
AL-22

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

Can a single wire or a loom carry for current and why

A

A single wire
A look has to carry less because of the heat that would be produced, but not able to disparate away

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

Is the voltage drop allowed bigger for a continuous or immediate drop

A

Voltage allows for an immediate drop is larger.

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

What is the voltage rating on an aircraft

A

600V

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

What are the three types of cable used on aircraft

A

Aurcfram
Interconnect
Equipment

17
Q

What is a shielded cable

A

Has one or more insulated strands that are overlayed with metallic (dielectric) braided shield that
cancels out interference

18
Q

What are high tension cables used for

A

high voltages for Engine and egnition systems

19
Q

What should you not do after high tension cables have been used

A

Touch them, wait 10-15 mins for energy to dissipate

20
Q

What are thermocouples made out of

A

Cromel or alumel

21
Q

How does a thermocouple work

A

Comprised of two different metals, an electric current will flow through the thermocouple when the two junctions are at different temperatures.

22
Q

What are co axial cables used for

A

For Radio Frequency (RF) energy which is guided from one point to another

23
Q

How many conductors do co axial cables contain

A

2 conductors which means they are not as bendy and prevents interference

24
Q

What is the timing for a fire proof cable

A

15 mins

25
Q

What is the timing for a fire resistant cable

A

5 mins

26
Q

What is a key way for

A

To ensure that the cables go on the right connectors

27
Q

What letters are missing on key ways and why are they missing

A

I, O, Q
Because they can be easily mistaken for numbers

28
Q

What is crimping

A

a method of firmly attaching a terminal or contact end to an electrical conductor by pressure, forming or reshaping a metal barrel together with the conductor

29
Q

Do more on crimping

A
30
Q

What does splicing do

A

the process of joining two or more wires together for repair or modification

31
Q

Do more on splicing

A