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7.7 Flashcards

1
Q

What are the 3 types of testing

A

Continuity, insulation and bonding

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2
Q

What is continuity testing?

A

That there is a link between two or more points in a circuit

A resistance link

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3
Q

When reading unknown resistance with a multimeter?

A

Set the resistance unit to the highest setting before testing and go down till reading is accurate

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4
Q

If resistors are in parallel when area increase resistance decreases what is the total resistance between a 100 ohm and 10 ohm resistor?

A

Less than 10

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5
Q

What should you do to a live circuit before continuity testing?

A

Disconnect power

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6
Q

What test should you do before Continuity tests?

A

Visual inspections

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7
Q

What is ohms law

A

1 volt to push 1 amp through 1 ohm

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8
Q

What are the 2 types of multimeter?

A

Analogue and digital

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9
Q

What are the advantages of an analogue multimeter?

A

See fluctuations on the needle and no battery required

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10
Q

What are the disadvantages of an Analogue multimeter?

A

Mistakes can be made usually larger and limited on what you can read

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11
Q

What voltage is used to test insulation resistance on aircraft?

A

250V to 300V

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12
Q

What is bonding for components in aircraft?

A

Transferring current flow in a safe path between parts

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13
Q

What is good bonding do on an aircraft?

A

Prevents radio interference

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14
Q

Where does static build up on an aircraft?

A

Leading edge on wings and nose

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15
Q

If everything is bonded on an aircraft correctly what should be the same overall?

A

Potential Difference

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16
Q

What unit is bonding tested primarily on for readings?

A

The master bonding point

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17
Q

Where is the main bonding point usually located in?

A

Normally in the avionics bay

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18
Q

If a cable is snagged or twisted after striping damaged what should you do?

A

Cut it off or start again

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19
Q

What are the 3 main crimp tools?

A

Daniel’s, Mini Daniel’s and AMP (T Head)

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20
Q

What code cable is Airbus and Boeing?

A

Airbus- ESPM

Boeing- SWPM

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21
Q

What do you used to make sure your using the correct turret and tool with the pin and socket?

A

A chart will be with all of them to make sure you use the correct one

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22
Q

What is the advantage of ASP terminal lugs (red thing with the hoop)

(4 advantages)

A

Good conductivity
Uniform
Strong connection
Corrosion proof

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23
Q

On AMP Terminal Lugs how many can you have on 1 terminal and what order for having 3 on 1 terminal?

A

Up to 4

Face down, face up, spacer, face down

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24
Q

What code should be on a AMP Terminal Lug?

A

A dot code

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25
When striping a cable how much should you strip?
Half the length of the barrel + 1/32 of a inch
26
Where are in line sealed splices used?
Areas exposed to the environment like the flaps
27
What AWG cable Gauge is used for hydraulic crimps
AWG 2 to 8
28
What is the fundimental difference between manual and hydraulic crimp tools?
Hydraulic can be realeased when needed
29
What shape crimp is hydraulic tools?
Hexagonal
30
What chapter is standard practices?
20
31
What are the 3 types of crimp tests?
Visual Inspection Tensile Test Volts Drop Test
32
When testing crimped fittings what’s first?
Test if correct amount of volts flows through it
33
What happens after testing the flow in a cable with a crimped fitting?
Pull apart see how much stress it can take
34
What 2 parts are rear release tools and how are they identified?
The coloured side is insertion tool White is the extraction tool
35
Where are Coax cables used for and what should you not do with them?
Radios and don’t bend too much
36
Where is Aluminium cables used?
In long distances and high current
37
Airframe cables have another name and where are they used?
Open cables Exposed environments
38
What cable is used in LRUs and we wont see?
Equipment cables
39
What cable is thin but high spec? Very commonly used
Thin wall cables
40
How long can Fire resistant cables last?
5 minutes
41
How long can Fire Proof cables last?
15 minutes
42
What is the ground cable called?
Fly lead Pig tale And sometimes just ground cable
43
What cable has a mesh to protect it And what is an issue using them?
Shielded cable Can interfere with signals if not grounded properly
44
What cable is specific for its use and can’t be changed by others?
Data Bus Cable
45
What cables have higher diameter mainly for power transfer and what Gauge is it normally?
Power Feeder 2 to 8 Gauge
46
What are the last 2 numbers represent?
It’s AWG Gauge
47
What is conduits?
A protective layer on cables to stop heat
48
What do we use to support cables?
P Clips Clove Hitch Knot
49
What should you fit when passing a cable through a Bulk Head?
Grommet and P Clamp to stop it moving
50
Why when cable clamps attached to pipes and other items there is a gap?
So heather is not transferred to either
51
Why are tie wrap guns used not normal cutters?
To keep zip ties flush
52
How must cables always be positioned?
Lay in parallel
53
How must a loom be secured?
Individual ties
54
What must all cables have when turning
Bend radius
55
What is the issue with bending cables too much
They chafe
56
What core was coax cables made before and what are they now?
Originally single core Now stranded
57
What is cooper loss?
Over stretches signal dies down
58
What is a BNC fitting and how does it attach?
Bayonet Nut Coupling A twist motion
59
What is a TNC fitting and how does it attach?
Threaded Nut Coupling A thread and more secure
60
How do you test a Coax cable?
Continuity test
61
What should you do before testing a Coax cable?
Disconnect from the LRU
62
What reading should you get from a up to spec Coax cable?
Make sure it reads 10,000 MiliOhms
63
What is a GVI?
General Visual Inspection
64
Regarding EWIS what do we look at over time?
Wire Degradation
65
What should you use to check the back of P Clips?
A Mirror
66
What is a back shell used for?
To protect the connector of a cable
67
What should you ensure a cloth is before using it to clean?
Clean, Dry and Lint-Free

M7 (14 decks)

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