Mod 7.7 (10)

Question 1

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

Answer 1

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

Question 2

Which intrument is used to check dead circuits?

Answer 2

A continuity checker is used to check dead circuits.

Question 3

What must a megger never test?

Answer 3

Electronic equipment.

Question 4

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

Answer 4

Precipitation induction.

Electrostatic induction.

Question 5

What can be said of a bonding system?

Answer 5

Bonding limits the potential difference between all parts

Reduces intererence

Aids in effectiveness of shielding

Question 6

Method of refueling an aircraft?

Answer 6

Bonding aircraft to the ground.

Bonding tanker to the ground.

Bonding aircraft to the tanker.

Bonding hose nozzle to a point on the aircraft.

Question 7

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

Answer 7

The terminal and the structure.

Question 8

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

Answer 8

The maximum resistance is indicated.

Question 9

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

Answer 9

0.002 omhs

Question 10

How many dots when crimping a white terminal?

Answer 10

2 dots.

Question 11

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

Answer 11

4

Question 12

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

Answer 12

Terminal Down

Terminal Down

Terminal Up

Question 13

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

Answer 13

30º

Question 14

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

Answer 14

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

Question 15

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

Answer 15

Coaxial cables.

Shielded wires and cables.

Question 16

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

Answer 16

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

Question 17

The Burndy M10S-1 consists of what 3 parts?

Answer 17

Tool

Die

Locator

Question 18

How are contacts of a module block labelled?

Answer 18

Upper contacts are labelled ‘A’

Lower conatcts are labelled ‘x’

Question 19

What would you use to protect connectors against corrosion?

Answer 19

WD-40

Question 20

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

Answer 20

ADF Sence antenna

Low range radio altimeter

Question 21

How to reduce effects of EMI?

Answer 21

Physical seperation of the wire bundles.

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

Question 22

How is the spacing for clamping of wire bundles?

Answer 22

Every frame.

Question 23

What areas would you not use plastic ties or straps?

Answer 23

On Coaxial cables.

On high temperature areas.

Question 24

What is the limitation for the spacing of clamps?

Answer 24

24 inches

Question 25

What is the limitation on making ties using lacing cord?

Answer 25

Ties are required every 8 inches. In high temperature areas, every 2 inches.

Question 26

What can be said about shielded cables under 50khz?

Answer 26

They are grounded at one end.

Question 27

When installing a clamp on a wire bundle?

Answer 27

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

Question 28

WD-40 should not be used where?

Answer 28

In high temperature areas.

Question 29

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

Answer 29

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

Question 30

Nylon clamps should not be used in?

Answer 30

Areas exceding 250ºF.

Question 31

Plastic ties may be used in what areas?

Answer 31

Plastic ties may be used in pressurised areas.

Question 32

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

Answer 32

No, bundle clearance must be maintained by another means.

Question 33

How is the choice of clamp determined?

Answer 33

Location, Enviroment, Bundle Size.

Question 34

How are Raychem contacts for module blocks coded?

Answer 34

Raychem contacts are colour coded.

Question 35

What type of wire uses contacts without colour coding?

Answer 35

AN wire with fibreglass insulation.

Question 36

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

Answer 36

The aircraft primary structure and the terminal.

Question 37

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

Answer 37

The bonding meter will indicate maximum resistance.

Question 38

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

Answer 38

4

Question 39

The lower 2 contacts in a module block are labled?

Answer 39

X.

Question 40

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

Answer 40

According to the type of energy being carried and According to its ability to act as a reciever/transmitter.

Question 41

Individual wire groups within a wire bundle should be?

Answer 41

Spot tied together within the bundle.

Question 42

How far apart are high vibration spot ties placed?

Answer 42

Every 2".

Question 43

Where is a single cord lacing aloud?

Answer 43

Inside boxes.

Question 44

The dead-ending of connectors shall take place?

Answer 44

4"- 6" from a connector.

Question 45

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

Answer 45

12".

Question 46

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

Answer 46

30º.

Question 47

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

Answer 47

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

Question 48

When intalling terminals on a terminal strip?

Answer 48

Washers must be placed between terminals of different sizes.

Question 49

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

Answer 49

Crimped over the un-stripped wire end.

Question 50

Stowed wire must be?

Answer 50

Visible from outside of the wire bundle.

Question 51

What determines the type of splice used on the aircraft?

Answer 51

The enviroment to which the splice may be installed.

Question 52

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

Answer 52

2 spliced per wire maximum.

Question 53

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

Answer 53

A Voltmeter.

Question 54

What test instrument is most suitable for continuity checking?

Answer 54

An Ohmmeter.

Question 55

Which type of aircraft equipment must not be meggered?

Answer 55

Equipment containing semi-conductors.

Question 56

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

Answer 56

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

Question 57

When using a rear release insertion /extractoin tool?

Answer 57

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

Question 58

In the WDM, how are lower case letter written?

Answer 58

* -A * uA * _A_

Question 59

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

Answer 59

Solvent Freon.