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Low Voltage Year 2 Mid term > Midterm > Flashcards

Midterm Flashcards

1
Q

what are 4 types of media that can be used for transmission in camera systems

A

coax
fiber
twisted pair
wireless

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2
Q

in an orthographic projection there can be up to _____ standard views and _______ of auxiliary views

A

6

any number

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3
Q

what is a RAID and what is it used for

A

Redundant array of independent disks

multiple backups in case one becomes corrupted

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4
Q

Category 4 transmission characteristics

A

Category is considered legacy

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5
Q

Definitions

A

NFPA 70 article 100

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6
Q

ANSI/TIA 569-D requires __________ sleeves for the first 40,000 square feet of area served by the intrabuilding backbone system, plus one additional sleeve of the same size for every 40,000 square feet after that

A

five four inch sleeves

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7
Q

Fire stops are used for restoring the integrity of _________ in fire rated materials

A

penetrations

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8
Q

570-C

A

Residential Telecommunications infrastructure standard

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9
Q

Name three sources of EMI

A

transformers
florescent lights
motors and generators

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10
Q

what is the max bend radius for a four pair UTP cable when it is being pulled

A

4 times cable diameter

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11
Q

name 4 items that shall not be located, installed, pass through, or enter a telecommunications closet

A

piping not related to the rooms purpose
transformers
motors
generators

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12
Q

as frequency increases _______ increases

A

attenuation

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13
Q

what are the TIA-570-c requirements for grade 2 cabling

A

two cat 5e or higher and two 72 ohm coax cable

fiber is optional

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14
Q

How can EMI and RFI problems in telecommunication cables be reduced

A

use a shielded cable and proper separation from EMI producing objects and your telecommunications cables

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15
Q

what scale uses the 1/2 or 1/4 size concept

A

mechanical engineers

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16
Q

what is the most common type of print for low voltage construction

A

floor plan

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17
Q

a ______ cabling system uses standardized media and layout for backbone and horizontal cabling

A

Structured

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18
Q

signal is measured in _____

A

Db

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19
Q

NFPA 70 article 250

A

Grounding and bonding

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20
Q

the ______ of a coaxial cable is used to protect against EMI

A

Braided shield

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21
Q

the print that shows the location of the structure relative to the lot, road, or to other structures is the

A

site plan or plot plan

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22
Q

what is the difference between a static and a dynamic IP address

A

static does not change if node moves to another network while dynamic IP’s are randomly assigned by the computer

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23
Q

what is standard POE voltage

A

48 VDC

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24
Q

list the 5 most common causes of communication problems

A 
poor termination
EMI and RFI
bend radius
pull too hard and stretch cable
staple wires to hard
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25
Q

what is a TBB and what are the minimum and maximum sizes for it

A

telecommunications bonding backbone - connects the primary busbar to the secondary busbar

6AWG - 750Kcmill

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26
Q

Telecommunications pathways and spaces

A

569-D

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27
Q

secondary bonding busbar

A

a busbar placed in each distribution room. bonds all equipment in Distribution room to Ground

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28
Q

ER

A

Equipment room

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29
Q

what are the installation requirements for plywood backboards in a telecommunications space according to 569-d

A 
3/4 in AC rated plywood size 8' by 4'
galvanized, stainless or zink coated fasteners
2 coats of fire rated paint
at least one wall covered
6 in above finished floor
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30
Q

Commercial Building grounding (Earthing) and bonding requirements for telecommunications

A

607-C

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31
Q

civil engineers plot plans most often use a ratio such as

A

1 inch equals 50 feet

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32
Q

which scale uses measurements like 1/4” or 1/8” equals 1 foot

A

architects scale

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33
Q

what is the general purpose of notes that relate to blueprint reading

A

provide additional information that is difficult to determine from drawing

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34
Q

what is the main purpose for CCTV/Network surveillance cameras

A

protection of assets, people, equipment, and reputation

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35
Q

environmental administration class 1

A

Single building single equipment room no Distribution Room

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36
Q

fire stops are used for restoring the integrity of ________ walls, floors, and other ________ penetrations

A

fire rated, fire rated

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37
Q

general requirements for wiring methods and materials

A

NFPA 70 article 300

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38
Q

name 3 coax connector types

A

F
BNC
N

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39
Q

list 3 of the most common types of prints for Low voltage construction

A

floor plan
site plan
elevations

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40
Q

569-D

A

Telecommunications pathways and spaces

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41
Q

607-C

A

Commercial Building grounding (Earthing) and bonding requirements for telecommunications

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42
Q

items such as transformers, motors, and generators should not be located in or near telecommunications equipment rooms because of

A

EMI
RFI
Induced noise voltage

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43
Q

When installing a structured cabling system it is important not to ______, _______, or ________ the cable

A

twist
Kink
Flatten

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44
Q

PSNEXT is the

A

undesired coupling of signal energy from a number of simultaneously transmitting pairs into a receiving pair

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45
Q

in a telecom room how far AFF should the lowest 110 block be installed during initial setup

A

24 inches

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46
Q

optical fiber cabling standard

A

568-C.3

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47
Q

if a new version of PoE were to come out that was rated to operate at 100 watts over two pairs what would the maximum expected current be in one of those circuits

A 
100/2 = 50 watts per pair
I = P/E = 50/48 = 1.04 amps
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48
Q

Electrical metallic tubing: Type EMT

A

NFPA 70 article 358

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49
Q

community antenna television and radio distribution systems

A

NFPA 70 article 820

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50
Q

Grounding and bonding

A

NFPA 70 article 250

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51
Q

what are the two parts of a MAC address

A

hardware manufacture ID

device individual ID number

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52
Q

what scale, most often used for large plot plans, uses a ratio such as 1 inch equals 50 feet

A

civil engineers

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53
Q

mechanical engineers scale uses

A

the 1/2 or 1/4 size concept

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54
Q

the braided shield of a coaxial cable is used to protect against ______.

A

EMI

55
Q

Who are the only three people that can make, or OK changes to job specifications

A

engineer, owner, architects

56
Q

The ________ is the point where a service provider’s drop wire is terminated

A

NID - Network Interface Device

57
Q

architects scale uses measurements such as _____

A

1/4” or 1/8” equals 1 foot

58
Q

What is the function of a perspective view

A

the spacial perspectives are more ascetically pleasing and work well for sales presentations

59
Q

class 1, class 2, and class 3 remote control, signaling and power limited circuits

A

NFPA 70 article 725

60
Q

why can you only terminate 24 pair cables on a 100 pair 110 block

A

so you don’t have to split the last pair.

4 pin clips wont line up and 5 pin clips color scheme will be off

61
Q

The _______ is the conductor that interconnects the telecommunications bonding and grounding infrastructure to the building’s power service equipment ground

A

Telecommunications bonding conductor

62
Q

Under appropriate TIA standard what is the maximum length for a section of conduit without a pull box

A

100 ft

63
Q

568-D

A

Generic Telecommunications cabling for customer premises

64
Q

568-D.1

A

commercial building telecommunications cabling standard

65
Q

MC

A

Main cross connect

66
Q

what is a BBC

A

backbone bonding conductor - bonds multiple TBBs together

interconnects telecommunications bonding backbones within a building

67
Q

Category 5e transmission characteristics

A

1-100MHz

68
Q

Category 5 transmission characteristics

A

Category is considered legacy

69
Q

define signal attenuation

A

weakening of signal as it travels the length of the cable

70
Q

what colors go to what pin number for the 568A 8P8C connector

A 
Pin 1 - white green
Pin 2 - Green white
Pin 3 - White orange
Pin 4 - Blue white
Pin 5 - white blue
Pin 6 - orange white
Pin 7 - White Brown
Pin 8 - Brown white
71
Q

X

A

cross connect

72
Q

what is the function of a leader line

A

point to a specific item with a detailed note

73
Q

NFPA 70 article 725

A

class 1, class 2, and class 3 remote control, signaling and power limited circuits

74
Q

what are the TIA-570-c requirements for grade 1 cabling

A

one cat 5e or higher and one 72 ohm coax cable

75
Q

NFPA 70 article 358

A

Electrical metallic tubing: Type EMT

76
Q

Customer-Owned outside plant telecommunications cabling standard

A

758-B

77
Q

Under appropriate NEC standard what is the maximum length for a section of conduit without a pull box

A

no limit

78
Q

DR

A

Distribution room

79
Q

with regard to camera lenses the _______ the MM number the narrower the field of view and the _______ the MM number the wider the field of view

A

larger

smaller

80
Q

what is the function of a section view

A

a part of a scaled drawing, drawn to a larger scale to provide additional information and show more detail

81
Q

568-C.3

A

optical fiber cabling standard

82
Q

when prints changes are made by an architect or engineer, what should be done?

A

get new prints
transfer as builds
disgard old print

83
Q

in a low lux environment , what camera type is best and why?

A

black and white.

black and white cameras require less light to create an accurate image

84
Q

environmental administration class 3

A

a campus with more than one building

85
Q

how is a backbone bonding conductor sized

A

should be same size as largest TB it is connected to

86
Q

what are the 4 basic sketching tips

A

1 - locate starting and finishing points for the desired line
2 - position your arm by making trial movements without drawing an actual line
3 - use a series of short lines between starting and terminal points
4 - after your line is correct darken it to a uniform weight or thickness

87
Q

what colors go to what pin number for the 568B 8P8C connector

A 
Pin 1 - white orange
Pin 2 - orange white
Pin 3 - White Green
Pin 4 - Blue white
Pin 5 - white blue
Pin 6 - green white
Pin 7 - white brown
Pin 8 - brown white
88
Q

environmental administration class 2

A

Single building with one ER and one or more distribution Rooms

89
Q

communications circuits

A

NFPA 70 article 800

90
Q

606-B

A

administration for commercial telecommunications infrastructure

91
Q

define NEXT

A

worst case pair to pair cross talk

undesired coupling of energy from the transmitting conductor pair into the receiving conductor pair

92
Q

what is the purpose of a riser diagram

A

show the floor by floor relationship of the electrical distribution system.
show quantity of devices per floor and per circuit

93
Q

Residential Telecommunications infrastructure standard

A

570-C

94
Q

When looking at a print that contains written dimensions and scaled dimensions: what dimensions should you use

A

written

95
Q

commercial building telecommunications cabling standard

A

568-D.1

96
Q

Category 3 transmission characteristics

A

1-16 MHz

97
Q

______ is the responsible organization for standardization of symbols

A

ANSI - American National standards Institude

98
Q

oblique projection

A

the front face is to the surface and the angles are usually at 45 degrees

99
Q

balanced twisted pair cabling components standard

A

568-C.2

100
Q

isometric projection

A

shows 3 object views together as they would appear tot he human eye, the corner is at the front of the drawings and the angles are at 30 degrees

101
Q

EF

A

entrance facility

102
Q

administration for commercial telecommunications infrastructure

A

606-B

103
Q

as _______ increases attenuation increases

A

frequency

104
Q

NFPA 70 article 100

A

Definitions

105
Q

Describe the function of a cutting plane line

A

visually cut out a section for further inspection

106
Q

568-C.2

A

balanced twisted pair cabling components standard

107
Q

what is the function of isometric views

A

show 3 objects together as they would appear to the human eye

semi-pictorial view of a object

108
Q

environmental administration class 4

A

multiple buildings on multiple sites

109
Q

WA

A

work area

110
Q

what is a legend used for on blue prints

A

determine what a symbol means, provide clarification on nonstandard or job specific information

111
Q

NFPA 70 article 800

A

communications circuits

112
Q

where can a person find what a print symbol means that is unknown

A

legend
book of standards
symbol library

113
Q

Category 6 transmission characteristics

A

1-250 MHz

114
Q

how many 300 pair 110 type terminals blocks are required to terminate 4 pair cables from 530 EOs

A

530/72 = 7.36 so 8 required

115
Q

IC

A

inter cross connect

116
Q

Lux and Foot candle

A

unit of measure for light

1 foot candle equals 10 lux

117
Q

Generic Telecommunications cabling for customer premises

A

568-D

118
Q

PBB

A

Primary bonding bushbar - located in a convenient and easily accessible location and bonded to the power service equipment room

119
Q

NFPA 70 article 820

A

community antenna television and radio distribution systems

120
Q

Category 6A transmission characteristics

A

1-500 MHz

121
Q

Category 8 transmission characteristics

A

1-2000 MHz

122
Q

if there are multiple telecommunications rooms located on one floor they must be connected by a _______ conduit or equivalent pathway at a minimum per ANSI/TIA 569 -D

A

3 inch

123
Q

what is the difference between bandwidth and throughput in reference to a NIC

A

bandwidth is how much data that can be transmitted at a given time where as throughput is actual measured speed

124
Q

as the load current changes, the __________ of a power supply tends to stay the same

A

output voltage

125
Q

ANSI/TIA 569-D requires five four inch sleeves for the first _____ square feet of area served by the intrabuilding backbone system, plus one additional sleeve of the same size for every ______ square feet after that

A

40,000

40,000

126
Q

NFPA 70 article 300

A

general requirements for wiring methods and materials

127
Q

S

A

station equipment

128
Q

in an ______ there can be up to 6 standard views and any number of auxiliary views

A

orthographic projection

129
Q

a structured cabling system uses standardized media and layout for _______ and ________ cabling

A

backbone and horizontal

130
Q

758-B

A

Customer-Owned outside plant telecommunications cabling standard

131
Q

what is the twisted pair connector type

A

8P8C

132
Q

what is the pair color combination and binder color combination of pair number 114 in a multi-pair UTP cable

A

black brown pair

white slate binder

133
Q

EOL

A

End of Line

134
Q

name 3 fiber connector types

A

SC
ST
LC

Low Voltage Year 2 Mid term (3 decks)

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