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M7 E > M7.7 > Flashcards

M7.7 Flashcards

1
Q

What must you ensure when working on de-energised circuits?

A
  • external power is off
  • battery is disconnected
  • red safety tag is fitted
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2
Q

When working in fuel tanks or vapour areas, what is the maximum amount of power allowed in your tools?

A

0.02 millijoules of energy or heat

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3
Q

How far should wire bundles be kept from pipes carrying flammable liquids?

A

50mm

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4
Q

How far should wire bundles be kept from pipes carrying nonflammable liquids?

A

15mm

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5
Q

What is the minimum bend radius for single wires?

A

3 times the outer diameter (10 times is preferred)

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6
Q

What is the minimum bend radius for wire bundles?

A

6 times the outside diameter

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7
Q

Why are drip loops used?

A

To prevent liquid getting into a plug

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8
Q

How often should primary support clamps be placed?

A

Not exceeding 24 inches

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9
Q

At what temperature should plastic clamps not be used?

A

121 degrees

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10
Q

What is the preferred orientation of a clamp?

A

With the mounting screw above the wire bundle

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11
Q

What is a harpoon tie?

A

It is a zip tie but in a straight line that holds cable raceways

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12
Q

What type of fabric is used to tie up wire bundles?

A

Cotton, nylon, fibreglass (cotton needs to be waxed)

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13
Q

Where should you not use ties on wires?

A

Fuel tanks

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14
Q

What can you use to prevent chaffing of multiple wire bundles?

A

Sleeving or tape

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15
Q

What is the maximum number of splices allowed in a wire?

A

3

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16
Q

The what must every undesignated wire have?

A

Dead ended with caps or sleeves (4-6 inches of connectors)

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17
Q

Where is the super champ forbidden?

A

Crimping

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18
Q

What letter is used to denote short housing?

A

S

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19
Q

How is every 10th contact shown?

A

It is circled

20
Q

If the contact is using letters what order do they go in?

A
  • upper case
  • lower case
  • double upper case
21
Q

What must every unused contact hole have?

A

Nylon or Teflon seal plugs

22
Q

What are polarisation keys used for?

A

To prevent the wrong computer being inserted into a shelf

23
Q

What does the shaded part of the polarisation key indicate?

A

The solid portion of the key

24
Q

What are the two ways of removing a connector pin?

A

Rear and front release (inserted from rear)

25
Q

What is the difference between crimping tools MS3191-1 and MS3191-4?

A
  • MS3191-1 has three separate turrets

- MS3191-4 has one multi head turret

26
Q

What are the two types of solder?

A
  • tin lead alloy (soft solder)

- silver solder (hard solder)

27
Q

What temperature does most tin lead alloy solder enter plastic state?

A

358.F

28
Q

What is the peruse of flux?

A

To remove the oxide from surfaces to be soldered and good flow of solder

29
Q

What are the four types of cores on a solder?

A
  • single
  • tri
  • multi
  • perforated
30
Q

What is solder sleeve pigtails most commonly used for?

A

Attaching a shield ground wire to shielded cables

31
Q

How many un-stripped wires are allowed per end cap?

A

Only one

32
Q

What is the maximum number terminals on one stud?

A

Four

33
Q

How many times can you bend a terminal?

A

Only once

34
Q

What is the configuration of an A-type terminal block?

A

One block, 8 sockets, four busses, two contacts per bus

35
Q

What is the configuration of an D-type terminal block?

A

One block, 8 sockets, two busses, four contacts per bus

36
Q

What is the configuration of an C-type terminal block?

A

One block, 8 sockets,

One bus, eight common contacts

37
Q

How do you ensure a low resistance connection for bonding leads?

A

Non-conduction paint and anodising films must be removed

38
Q

What should be done after installation of aground?

A

Checked by measuring the resistance between ground and aircraft

39
Q

How may volts are tests done at?

A

250v or 500v

40
Q

What type of circuits must continuity testing be done on?

A

Ones with no power applied

41
Q

What is ageing of a wire?

A

The health of the wire’s insulation relative to the conditions its been in

42
Q

What tells you how to do maintenance and repairs on standard electrical items?

A

Electrical standard practices manual (ESPM)

43
Q

What is flammable leakage zone?

A

An area where leakage of flammable liquid and vapours can occur

44
Q

What grade of temperature should a repair of a wire harness e?

A

Temperature grade D

45
Q

What are SWAMP areas?

A

Severe weather and moisture prone

46
Q

What can chafing wires cause?

A

A short circuit

47
Q

When would corrosion occur on wires, cables, grounds,connectors?

A

When there is a leak of water, acid, beach

M7 E (14 decks)

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