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C7 test > C7 test > Flashcards

C7 test Flashcards

1
Q

How is a fiber optic cable terminated?

A

568SC

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2
Q

What does VOM stand for?

A

Volt Ohmmeter

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3
Q

What does ACV stand for?

A

Alternating current voltage

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4
Q

What does DCV stand for?

A

Direct current voltage

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5
Q

How should you install vertical cables

A

start at the top and pull down, then tie from the top down

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6
Q

A low voltage contractor can install equipment carrying a maximum of

A

91 volts

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7
Q

What is the maximum number of jacks that can be installed on a single gan faceplate?

A

6

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8
Q

what is the max bending radius for fiber optic cable

A

20 times the diameter

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9
Q

how far into a building can a flooded cable be run before it must be terminated

A

50 feet

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10
Q

what is the max pulling tension for CAT 5 cables

A

25 lbs

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11
Q

what is the typical max pulling tension for indoor fiber optic cables

A

100 lbs

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12
Q

what is the typical max pulling tension for outdoo fibe cable

A

600 lbs

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13
Q

what is the best method for splicing singlemode fiber

A

fusion splice with strain relief boot

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14
Q

What is the best method for splicing multimode fiber

A

mechanical alignment sleeve with index matching gel

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15
Q

what is a core drill

A

a hollow drill used to remove section of material

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16
Q

when can overhead communicartion lines be installed on a cross member that has high viltage lines attached

A

never

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17
Q

which of the followin is most approprate to fight electral fire

A

Co2

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18
Q

for which of the following would you use a spade bit

A

wood

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19
Q

when dealing with tempoirary power at a job site, what precaitionary steps need to be taken

A

it should be installed so that it is protected from physical damage

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20
Q

what is the max height a worker may be ex[osed to before a sagety harness is required

A

15 feet

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21
Q

when placing a connector on a cat 5 cable, how much of the cable jacket can be stripped back

A

only as much as you need

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22
Q

when placing a connector on a CAT 5 cable , how far may the wir pairs be untwisted

A

.5”

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23
Q

what are the three ost common cental office cabling systems

A

UTP, STP and fiber optics

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24
Q

as a general rule, what is the min bending radius of conduits 1 “ and larger

A

6 times the diameter

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25
Q

what connecting audio cable, what is the red connector

A

right audio

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26
Q

when connecting audio cables, what is the white connector used for

A

left audio

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27
Q

what is the min heigh over a residential driveway

A

12’

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28
Q

what is the smallest speaker

A

tweeter

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29
Q

what is typically found in floors in CA

A

Asbestos

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30
Q

What is typiclly found in electrial light ballasts in CA

A

PCB (polycyclorinated biphenyls)

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31
Q

what do you not do when you test fiber optic with OTDR

A

look in the other end

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32
Q

what is the min ovelap of an extension ladder

A

36”

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33
Q

what type of jack should be used on a CAT 5 100MHZ cable installation

A

RJ45

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34
Q

what do you do whith materails if you are done with them

A

mover them out of the way to keep the are clean, uncluttered and safe

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35
Q

where should you keep the brooms and shovels on a jobsite

A

in a place safe to get to

36
Q

what does ADA compliant refer to

A

contracors followed American with Disabilities Act codes and requirements

37
Q

what should you do when you are finished with your power tools

A

wait until all motion has stopped before leaving the machine

38
Q

1/4 scale refers to

A

4’- 1”

39
Q

you are wiriing inside a manhole that is 6’ x 12’ and 7’ form floor to ceilling. Is this situation allowed

A

yes

40
Q

what is the 15th pair in 24 pair cable

A

black/slate

41
Q

what is the 25th pair in 25 pair cable

A

violet/slate

42
Q

which is the following should you take into consideration when running low voltage wiring

A

electomagnic interference

43
Q

which of the following is used for horizontal cabling

A

CAT5, Fiber Optic cable, shielded Twisted Pair

44
Q

the network ground connection for low voltage systmes should

A

be grounded at the main electrical panel

45
Q

which of the following shoudl you do before enering a confined space

A

test the air inside the area

46
Q

how many pairs are in backbone cabling

A

25

47
Q

what can be done make pulling long runs of wire though conduit

A

use lube

48
Q

what gauge wire is used to ground telecommunication cable and equipment

A

6 AWG

49
Q

what color is used for the first pair when installing telephone lines

A

blue

50
Q

what material is most commonly used a backing to mount teminatin blocks

A

plywood

51
Q

when should look into the end of active optic fiber

A

never

52
Q

if you deviated form the plans , you must make a note of the change on a separte set of plans.

A

as builts

53
Q

which is the folloing is used to support telephone wires

A

channel molding

54
Q

what type fo fire extingusihser should not be used on an electical fire

A

H20

55
Q

what should you do whith a broken drill

A

tag it as broken and remove it from the jobsite

56
Q

what is the propoer way to lift a tool

A

by the handle

57
Q

what is the total impedance of five 8-ohm speakers connected in series

A

40 ohms

58
Q

what is the total impedance of five 8-ohm spekers connected in parallel

A

1.6 ohms

59
Q

what is considered to be the most dangerious in electrical shock

A

amps

60
Q

which has the greatest potential to cause harm 600 v or 24 V

A

both have the same potential

61
Q

when running low voltage wiriing through a fire wall, how do you seall the opening

A

intmescent fire stop

62
Q

how do you atach wired in a teminal block

A

puch down tool

63
Q

what is the max lenghth of a horizonal cross connectionect

A

5 m

64
Q

what is the power rating of a circuit that has a voltage of 10 volts and a resistatnce of 12 ohms

A

8.3 watts

65
Q

where should the key be kept when equiptment is locked out and subcontractor is involved

A

on the direct person of subcontractor

66
Q

what is the max stripping for coaxial cable when teminating coaxial cable F connectors

A

1/2 in

67
Q

what is the max working lengh for a 40’ exentsion ladder

A

36’

68
Q

what shoudl you do if have one shielded cable that eners two building

A

gound both ends in both buidlings

69
Q

during excavation, how far from the edge must excaved spoils be deposited

A

2’

70
Q

what is the max lengh for a fall protection harness

A

6’

71
Q

when shoudl an employer give instruction on fail hazards

A

immediately

72
Q

when do you connect a safty harness

A

back shoulder

73
Q

what is the min amounbt a saftery should hold

A

5,000 lbs

74
Q

when should fall retrain systms be inspected

A

twice per year

75
Q

in clay soil, how deep can a trench be before it requires shoring

A

5’

76
Q

at what depth is a ladder required for worker access

A

4’

77
Q

what is the max width of a trench before a bridge is required

A

30’

78
Q

what wire should be used to cross connect a stradard telephone connections

A

24 AWG

79
Q

what tyoe of jack should be used on a Cat 6 cable installation

A

RJ-45

80
Q

what is the max span allowed for scaffold planking

A

10 feet

81
Q

what is the max vertical height for a medium-duty tube and couple scaffold

A

125’

82
Q

what is the smalled width allowed for scaffold planking

A

10”

83
Q

what is metal scaffold designed for

A

live loads, wind loads, dead loads

84
Q

what is the min a max heigh of scaffold guardrail

A

42”

85
Q

what is the max overhang of scaffold plank

A

18”

C7 test (4 decks)

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