Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Elementary Electrical Engineering (AC/DC) > Electrical Wiring > Flashcards

Electrical Wiring Flashcards

1
Q

a single conductor which material is most commonly being copper or aluminum

A

wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

two or more insulated wires wrapped in one jacket

A

cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

types of electrical cable

A

twisted pair cable, multi conductor cable, coaxial cable, fiber optic cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

has two cables that are twisted across each other

A

twisted pair cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

this cable is best suited for carrying signals

A

twisted pair cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

twisting in twisted pair cable can avoid noise that is produced by __________

A

magnetic coupling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

generally used in telecommunication and data communication

A

twisted pair cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

has two or more conductors that are insulated from each other

A

multi conductor cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

purpose is to protect signal integrity by reducing hum, noise, and crosstalk

A

multi conductor cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

its applications include computers, communications, instrumentation, sound, control, audio, and data transmission

A

multi conductor cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are multi conductor and twisted pair cables called?

A

balanced line configuration cables

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

composed of an inner solid conductor surrounded by a paralleled outer foil conductor that is protected by an insulating layer

A

coaxial cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what separates the two conductors in a coaxial cable?

A

insulating dielectric

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

generally used in TV cables

A

coaxial cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

called an unbalanced line as the signal on the two conductors is not same which result in interference

A

coaxial cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

performance is more stable than a twisted pair cable

A

coaxial cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

has a much greater bandwidth than metal cables; can carry more data

A

fiber optic cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

transmits signals by a bundle of glass threads

A

fiber optic cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

less susceptible to interference

A

fiber optic cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What are the two reasons why fiber optic cables are increasingly being used instead of traditional copper cables despite being expensive?

A

can carry more data, less susceptible to inteference

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Types of Electrical Wire

A

solid wire, stranded wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

a single conductor that is either bare or insulated by a protective-colored sheath

A

solid wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

offers low resistance and are perfect for use in higher frequencies

A

solid wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

consists of thon strands of wires twisted together in a sheath

A

stranded wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

more flexible and have larger cross-sectional area than solid wires for the same current carrying capacity

A

stranded wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Aircraft wire is measured by the _________, with the larger numbers representing the ______ wires.

A

American Wire Gauge (AWG) System, smaller

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

also used to describe stranded wire

A

AWG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

The AWG of a stranded wire represents the sum of the ________ of the individual strands; the gaps between the strands are _______.

A

cross-sectional areas, not counted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

When stranded wires are made with circular strands, these gaps occupy about ______ of the wire area, thus requiring the overall bundle diameter to be about ______ larger than a solid wire of equal gauge.

A

25%, 13%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Stranded wires are specified with three numbers, what are these?

A

overall AWG size, number of strands, AWG size of a strand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

What separates the number of strands and the AWG of a strand?

A

slash

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

The smallest size wire normally used in aircraft is ______ wire, which has a diameter of about ______.

A

22-gauge, 0.025 inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Conductors carrying large amounts of current are typically of the ______, or ______ size, and have a diameter of about _____.

A

0000, 4-aught, 0.52 inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

What determines the amount of current a wire is capable of carrying?

A

its cross-sectional area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

One mil is equal to?

A

0.001 inches or 1/1000 inches

36
Q

125 mils = ______ inches

A

0.125

37
Q

To find the cross-sectional area of a round conductor in circular mils, what do we do?

A

square the conductor’s diameter

38
Q

unit of measure for square or rectangular conductors

A

square mil

39
Q

To determine the cross-sectional area of such a conductor in square mils, what do we do?

A

multiply the conductor’s thickness by its width

40
Q

1 circular mil = _____ square mil

A

0.7854

41
Q

To convert a circular mil area to a square mil area, what do we do?

A

multiply the area in circular mils by 0.7854 mil

42
Q

To convert a square mil area to a circular mil area, what do we do?

A

divide the area in square mils by 0.7854

43
Q

factors to consider in new wire installations

A

system operating voltage, allowable voltage drop, continuous or intermittent basis

44
Q

Identification markings should be placed at each end of the wire and at _________ interval along the length of the wire.

A

12 to 15 inches

45
Q

Wires less than ____ in length need not be identified.

A

3 inches

46
Q

Wires ______ in length should be identified approximately at the center.

A

3 to 7 inches

47
Q

Two methods of marking wire or cable

A

direct marking, indirect marking

48
Q

accomplished by printing the cable’s outer covering

A

direct marking

49
Q

accomplished by printing a heat shrinkable sleeve and installing the printed sleeve on the wire or cables outer covering

A

indirect marking

50
Q

Indirectly-marked wire or cable should be identified with printed sleeves at each end and at intervals not longer than ______.

A

6 feet

51
Q

The individual wires inside a cable should be identified within ______ of their termination.

A

3 inches

52
Q

The identification marking should identify the wire with regards to what?

A

type of circuit, location within the circuit, wire size

53
Q

2 P 215 A 4 N ALUM

What is 2?

A

unit number

54
Q

2 P 215 A 4 N ALUM

What is P?

A

circuit function letter

55
Q

2 P 215 A 4 N ALUM

What is 215?

A

wire number

56
Q

2 P 215 A 4 N ALUM

What is A?

A

wire segment letter

57
Q

2 P 215 A 4 N ALUM

What is 4?

A

wire size number

58
Q

2 P 215 A 4 N ALUM

What is N?

A

ground, phase, or thermocouple letter

59
Q

2 P 215 A 4 N ALUM

What is ALUM?

A

suffix

60
Q

used to identify the circuit function

A

circuit function letter

61
Q

used to differentiate between wires in a circuit

A

wire number (s)

62
Q

Wires with the same circuit function having a common terminal connection or junction will have the _____ wire number but _____ segment letters.

A

same, different

63
Q

a conductor between two terminals or connections; used to differentiate between conductor segments in a particular circuit

A

wire segment letter

64
Q

letters not used as segment letters

A

I and O

65
Q

Double letters are used for wire segments when more than ____ segments are required.

A

24

66
Q

used to identify the size (AWG) of the wire

A

wire size number

67
Q

For coaxial cables and thermocouple wires, a _____ is used in lieu of the wire size number.

A

dash

68
Q

used as a suffix to the wire identification code to identify any wire or cable that completes the circuit to the ground network

A

N

69
Q

used as a suffix on the wire identification code to identify phase of wires that are in the three-phase power distribution wiring of AC systems

A

A, B, or C

70
Q

shall be used as a suffix on the cable identification code to identify the ungrounded wire or cable that is in a single-phase system

A

V

71
Q

Chromel consists of

A

90% nickel and 10% chromium

72
Q

suffix for Chromel

A

CHROM

73
Q

suffix for Constantan

A

CONS

74
Q

Constantan consists of

A

55% copper and 45% nickel

75
Q

suffix for Alumel

A

ALML

76
Q

Alumel consists of

A

95% nickel, 2% aluminum, 2% manganese, 1% silicon

77
Q

suffix for copper

A

COP

78
Q

suffix for iron

A

IRON

79
Q

The inside diameter of the conduit must be _____ larger than the maximum diameter of the wire bundle.

A

25%

80
Q

What does the nominal diameter of a conduit represent?

A

conduit’s outside diameter

81
Q

method of installation that provides the best mechanical protection for electrical wiring

A

conduit

82
Q

quickest and easiest way to install wiring

A

open wiring

83
Q

allows easy access when troubleshooting or servicing individual circuits

A

open wiring

84
Q

All of the wire bundles installed in aircraft should be routed so they are at least _____ away from any control cable and will not interfere with any moving components.

A

3 inches

85
Q

a method of intercepting electrical energy and shunting it to electrical ground

A

shielding

86
Q

term used to describe the squeezing of a terminal around a wire to secure the wire and provide a high-quality electrical connection

A

crimping

87
Q

process of cutting the protective insulation of a wire and gently pulling it from the end

A

stripping the wire

Elementary Electrical Engineering (AC/DC) (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions