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M7 > 7.7 > Flashcards

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
Q

When striping a cable how much should you strip?

A

Half the length of the barrel + 1/32 of a inch

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26
Q

Where are in line sealed splices used?

A

Areas exposed to the environment like the flaps

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27
Q

What AWG cable Gauge is used for hydraulic crimps

A

AWG 2 to 8

28
Q

What is the fundimental difference between manual and hydraulic crimp tools?

A

Hydraulic can be realeased when needed

29
Q

What shape crimp is hydraulic tools?

30
Q

What chapter is standard practices?

31
Q

What are the 3 types of crimp tests?

A

Visual Inspection
Tensile Test
Volts Drop Test

32
Q

When testing crimped fittings what’s first?

A

Test if correct amount of volts flows through it

33
Q

What happens after testing the flow in a cable with a crimped fitting?

A

Pull apart see how much stress it can take

34
Q

What 2 parts are rear release tools and how are they identified?

A

The coloured side is insertion tool

White is the extraction tool

35
Q

Where are Coax cables used for and what should you not do with them?

A

Radios and don’t bend too much

36
Q

Where is Aluminium cables used?

A

In long distances and high current

37
Q

Airframe cables have another name and where are they used?

A

Open cables

Exposed environments

38
Q

What cable is used in LRUs and we wont see?

A

Equipment cables

39
Q

What cable is thin but high spec?
Very commonly used

A

Thin wall cables

40
Q

How long can Fire resistant cables last?

41
Q

How long can Fire Proof cables last?

A

15 minutes

42
Q

What is the ground cable called?

A

Fly lead
Pig tale
And sometimes just ground cable

43
Q

What cable has a mesh to protect it
And what is an issue using them?

A

Shielded cable
Can interfere with signals if not grounded properly

44
Q

What cable is specific for its use and can’t be changed by others?

A

Data Bus Cable

45
Q

What cables have higher diameter mainly for power transfer and what Gauge is it normally?

A

Power Feeder

2 to 8 Gauge

46
Q

What are the last 2 numbers represent?

A

It’s AWG Gauge

47
Q

What is conduits?

A

A protective layer on cables to stop heat

48
Q

What do we use to support cables?

A

P Clips
Clove Hitch Knot

49
Q

What should you fit when passing a cable through a Bulk Head?

A

Grommet and P Clamp to stop it moving

50
Q

Why when cable clamps attached to pipes and other items there is a gap?

A

So heather is not transferred to either

51
Q

Why are tie wrap guns used not normal cutters?

A

To keep zip ties flush

52
Q

How must cables always be positioned?

A

Lay in parallel

53
Q

How must a loom be secured?

A

Individual ties

54
Q

What must all cables have when turning

A

Bend radius

55
Q

What is the issue with bending cables too much

A

They chafe

56
Q

What core was coax cables made before and what are they now?

A

Originally single core
Now stranded

57
Q

What is cooper loss?

A

Over stretches signal dies down

58
Q

What is a BNC fitting and how does it attach?

A

Bayonet Nut Coupling

A twist motion

59
Q

What is a TNC fitting and how does it attach?

A

Threaded Nut Coupling

A thread and more secure

60
Q

How do you test a Coax cable?

A

Continuity test

61
Q

What should you do before testing a Coax cable?

A

Disconnect from the LRU

62
Q

What reading should you get from a up to spec Coax cable?

A

Make sure it reads 10,000 MiliOhms

63
Q

What is a GVI?

A

General Visual Inspection

64
Q

Regarding EWIS what do we look at over time?

A

Wire Degradation

65
Q

What should you use to check the back of P Clips?

66
Q

What is a back shell used for?

A

To protect the connector of a cable

67
Q

What should you ensure a cloth is before using it to clean?

A

Clean, Dry and Lint-Free

M7 (14 decks)

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