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Mod 7: Maintenance Practices > Mod 7.7 (10) > Flashcards

Mod 7.7 (10) Flashcards

1
Q

The term a/c electrical installation is of the single wire type means?

A

Only one wire is used to support the supply of electric current to the the user, with the return path via the structure.

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2
Q

Which intrument is used to check dead circuits?

A

A continuity checker is used to check dead circuits.

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3
Q

What must a megger never test?

A

Electronic equipment.

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4
Q

Two ways in which electrical energy can build up on an aircraft?

A

Precipitation induction.

Electrostatic induction.

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5
Q

What can be said of a bonding system?

A

Bonding limits the potential difference between all parts

Reduces intererence

Aids in effectiveness of shielding

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6
Q

Method of refueling an aircraft?

A

Bonding aircraft to the ground.

Bonding tanker to the ground.

Bonding aircraft to the tanker.

Bonding hose nozzle to a point on the aircraft.

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7
Q

After instalation of a ground point, resistance measurement is carried out between?

A

The terminal and the structure.

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8
Q

On a bonding meter when 60ft lead is held clear and the 6ft double prongs are bridged together:

A

The maximum resistance is indicated.

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9
Q

The scale of a bonding meter is graduated in divisions of?

A

0.002 omhs

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10
Q

How many dots when crimping a white terminal?

A

2 dots.

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11
Q

The maximum number of terminations a single stud can accomodate is?

A

4

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12
Q

The configuration of 3 terminals placed on a terminal strip is?

A

Terminal Down

Terminal Down

Terminal Up

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13
Q

On terminal strips the terminal may be bent to a max of?

A

30º

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14
Q

How many inches from a connector shall dead-ending take place?

A

4-6 inches from a connector, dead ending will take place.

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15
Q

What wires require an engineering approval before the can be repaired?

A

Coaxial cables.

Shielded wires and cables.

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16
Q

What is the maximum allowable amount of splices in any wire segment?

A

2 is the maximum amount of splices in a wire segment.

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17
Q

The Burndy M10S-1 consists of what 3 parts?

A

Tool

Die

Locator

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18
Q

How are contacts of a module block labelled?

A

Upper contacts are labelled ‘A’

Lower conatcts are labelled ‘x’

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19
Q

What would you use to protect connectors against corrosion?

A

WD-40

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20
Q

What systems are critical in length and can’t be repaired?

A

ADF Sence antenna

Low range radio altimeter

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21
Q

How to reduce effects of EMI?

A

Physical seperation of the wire bundles.

Categorising each wire according to the type of energy carried by it.

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22
Q

How is the spacing for clamping of wire bundles?

A

Every frame.

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23
Q

What areas would you not use plastic ties or straps?

A

On Coaxial cables.

On high temperature areas.

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24
Q

What is the limitation for the spacing of clamps?

A

24 inches

25
Q

What is the limitation on making ties using lacing cord?

A

Ties are required every 8 inches.

In high temperature areas, every 2 inches.

26
Q

What can be said about shielded cables under 50khz?

A

They are grounded at one end.

27
Q

When installing a clamp on a wire bundle?

A

The mounting screw should be above the wire bundle when installing a clamp on a wire bundle.

28
Q

WD-40 should not be used where?

A

In high temperature areas.

29
Q

In a rear release system which side does the connector get installed and removed from?

A

In a rear release system the contacts are installed and removed from the rear of the connector.

30
Q

Nylon clamps should not be used in?

A

Areas exceding 250ºF.

31
Q

Plastic ties may be used in what areas?

A

Plastic ties may be used in pressurised areas.

32
Q

If wire bundles run above or beside pipes carrying flammable material, can you support it with said pipe?

A

No, bundle clearance must be maintained by another means.

33
Q

How is the choice of clamp determined?

A

Location,

Enviroment,

Bundle Size.

34
Q

How are Raychem contacts for module blocks coded?

A

Raychem contacts are colour coded.

35
Q

What type of wire uses contacts without colour coding?

A

AN wire with fibreglass insulation.

36
Q

What measurement points should be used when performing a bonding test of a terminal installed at a ground stud?

A

The aircraft primary structure and the terminal.

37
Q

Proir to use the prongs on a 2 pronged probe of a bonding meter are shorted together. What will the meter indicate?

A

The bonding meter will indicate maximum resistance.

38
Q

What is the maximum number of terminations a single stud can accomodate?

A

4

39
Q

The lower 2 contacts in a module block are labled?

A

X.

40
Q

In order to reduce EMI in wire bundles, how are wires categorised?

A

According to the type of energy being carried

and

According to its ability to act as a reciever/transmitter.

41
Q

Individual wire groups within a wire bundle should be?

A

Spot tied together within the bundle.

42
Q

How far apart are high vibration spot ties placed?

A

Every 2”.

43
Q

Where is a single cord lacing aloud?

A

Inside boxes.

44
Q

The dead-ending of connectors shall take place?

A

4”- 6” from a connector.

45
Q

Splices shall not be within how many inches of a terminating device?

A

12”.

46
Q

On terminal strips a,terminal may be bent to a maximum of?

A

30º.

47
Q

What is the maximum allowable angle to which a terminal tongue may be bent?

A

The maximum allowable angle to which a TERMINAL TONGUE can be bent is 90º AWAY from the barrel.

48
Q

When intalling terminals on a terminal strip?

A

Washers must be placed between terminals of different sizes.

49
Q

End caps for dead-ending and stowing of un used wire are?

A

Crimped over the un-stripped wire end.

50
Q

Stowed wire must be?

A

Visible from outside of the wire bundle.

51
Q

What determines the type of splice used on the aircraft?

A

The enviroment to which the splice may be installed.

52
Q

What is the maximum number of splices that may be installed on a wire?

A

2 spliced per wire maximum.

53
Q

What item can be used when testing a live circuit for continuity?

A

A Voltmeter.

54
Q

What test instrument is most suitable for continuity checking?

A

An Ohmmeter.

55
Q

Which type of aircraft equipment must not be meggered?

A

Equipment containing semi-conductors.

56
Q

What is the function of static dischargers in a bonding system?

A

They provide a low interference path for static charge dissipation into the atmosphere.

57
Q

When using a rear release insertion /extractoin tool?

A

The contact shall be inserted and extracted from the rear of the connector.

58
Q

In the WDM, how are lower case letter written?

A
  • -A
  • uA
  • A
59
Q

What material should be used to clean co-axial connectors?

A

Solvent Freon.

Mod 7: Maintenance Practices (10 decks)

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