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May 2023 SWE > Aircraft Electrical Systems/Wire knowledge > Flashcards

Aircraft Electrical Systems/Wire knowledge Flashcards

1
Q

What is the leading cause of wiring system failure?

A

Chafing

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2
Q

What is the wiring integrity program process guide?

A

CGTO PG 85-00-210-A

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3
Q

What shall splices not be used on?

A

On firing circuits or control circuits associated with ordinance or explosive systems

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4
Q

What frequencies does TACAN operate on?

A

UHF (1000MHz) band with 126 two-way channels in the operational mode (X 0r Y) for 252 total

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5
Q

What are the two means of thermal anti-ice on CG aircraft?

A

Bleed air and Resistive Heating Element

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6
Q

What are three methods of deicing on CG aircraft?

A

Bleed air, resistive heating element and pneumatic

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7
Q

What is the only AC that uses pneumatic deicing?

A

C130J

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8
Q

What does a regulator do in a windshield anti-ice system?

A

Maintain temperature by controlling input voltage to power relay

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9
Q

What does a thermistor/temp sensor do in a windshield anti-ice system?

A

Provides windshield temperature feedback resistance to regulator

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10
Q

What does a pneumatic deicing system use?

A

Rubber deicers, called boots or shoes, attached to leading edge of the wing and stabilizers

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11
Q

What is the minimum inside bend radius of a wire bundle?

A

10 times the diameter of the largest wire in the bundle

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12
Q

What is the minimum inside bend radius of a flexible coax?

A

6 times diameter of cable

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13
Q

What is the minimum inside bend radius of a jumper wire?

A

3 times diameter of wire

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14
Q

What is the minimum inside bend radius of a semi-rigid coax?

A

10 times the diameter of the cable

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15
Q

Do fiber optic or potted connectors require a drip loop?

A

No

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16
Q

What radius should thermocouples leads be bent to?

A

Less than two-inch radius

17
Q

What is the slow action of opening or closing a circuit breaker actuator without engaging the locking mechanism?

A

Teasing

18
Q

Between what temperatures should solder be kept to keep it in a liquified state?

A

450-500 degrees F (232-260 degree C)

19
Q

Circuit breaker suffix for Sine High Vibration?

A

V

20
Q

Circuit breaker suffix for random vibrations

A

C-K

21
Q

Circuit breaker suffix P

A

Cover Plate Mounting Bracket with different mounting hardware

22
Q

Circuit Breaker Suffix L

A

Long push, long button

23
Q

Circuit Breaker Safety Percent?

A

20%

24
Q

What bonding class for shock hazard?

A

H

25
Q

Resistance requirements for shock hazard bonding class?

A

0.1 Ohm or less

26
Q

What bonding class is “C”

A

Current Path Return

27
Q

Bonding Class “C” resistance requirement?

A

Such that the voltage drop does not exceed the limits of operation

28
Q

What structures should not be used for a current path return?

A

Magnesium Alloy

29
Q

What bonding class is “R”

A

RF potentials, for EMI protection

30
Q

how much clearance for wires from a structure?

A

1/2 inch

31
Q

How much clearance from wire to fluid carrying lines?

A

2 inches

32
Q

What wires/connectors do not require a “drip loop”?

A

Potted or fiber-optic connectors

33
Q

What is used to block electromagnetic interference?

A

Filter Cable or wire

34
Q

Rear release connectors are required to have how many blue color bands that are readily visible when connected?

A

One or more blue color bands

35
Q

What fluid has been proven to be a major
contributor to corrosion failure of connectors?

A

Deicing

36
Q

Under ultraviolet light, traces of flux appear as what color?

A

Fluorescent yellow to light
brown residue

37
Q

What frequency is HF?

A

3 MHz-30MHz

38
Q

What’s the frequency range of VHF?

A

30MHz - 300MHz

39
Q

What is the frequency range of UHF?

A

300MHz - 3,000MHz

May 2023 SWE (11 decks)

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