Chapter 12 Flashcards

1
Q

Easement

A

A right acquired by one party to
use land belonging to another
party for a specific purpose.
TDMM.* Page G-65

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2
Q

HH

A

Handhole
A structure similar to a small
cable can be pulled, but not
large enough for a person to
fully enter to perform work.
TDMM.* Page G-90

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3
Q

Innerduct

A

A non-metallic duct, either
circular or fabric mesh, placed
within a larger pathway. (T IA)
TDMM.* Page G-97

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4
Q

MH

A

Maintenance Hole
1 .A vault located in the around or
earth as part of an underground duct
system and used to facilitate placing,
splicing, and maintenance of cables,
as well as the placing of associated
equipment, in which it is expected
that a person will enter to perform
work.
2.A hole through which access to an
underground or enclosed structure
may be gained.
TDMM.* Page G-116

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5
Q

NI

A

Network Interface
The point of connection between
the AP network and private
network. Also referred to as the
demarcation point or DP.
TDMM: Page 12-23

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6
Q

OSP

A

Outside Plant
1 . Telecommunications
infrastructure designed for
installation exterior to buildings
and is typically routed into the
entrance facility. (TIA)
2.Communications infrastructure
outside of the buildings/premises
using underground conduits and
vaults, direct-buried cable, aerial
plants, and wireless.
TDMM.* Page G-135

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7
Q

Service Diversity

A

The placing of alternate facilities
to temporarily replace the main
system in case of failure.
TDMM.* Page 12-17

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8
Q

Underground
Facilities

A

Cables that are placed in
subsurface conduits using MHS,
handholes, and/or pull boxes as
access points to the cable.
TDMM.* Page 12-1

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9
Q

Name 3 critical factors to
consider when planning for
maintenance and future
growth for a property where
campus backbone
cables exist.

A

1 .Familiarity with the routes and
spaces
2.Working capacity versus spare
cable capacity
3.Cable composition
TDMM.* Page 12-1

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10
Q

Name 5 advantages of
underground conduits.

A
  1. Provide out-of-sight service and maintain the property’s aesthetic appearance
  2. Are adaptable for future facility placement
    or removal without disturbing the property
  3. Are economical over a long life
  4. Provide additional physical cable protection
  5. Minimize the need for possible subsequent repairs to the property when growth is required for existing facilities
    TDMM.* Page 12-1
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11
Q

Name 4 disadvantages of
underground conduits.

A
  1. Have a high initial installation cost
  2. Require careful route planning
  3. Provide a possible path for water or gas to enter the building if improperly sealed
  4. Usually require more installation time than aerial or direct-buried
    installations
    TDMM.* Page 12-2
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12
Q

Name 3 advantages of
direct-buried cabling.

A
  1. Provides out-of-sight service
    and maintain the property’s
    aesthetic appearance
  2. Usually has a low initial
    installation cost
  3. Can easily bypass
    obstructions
    TDMM.* Page 12-3
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13
Q

Name 2 disadvantages of
direct-buried cabling.

A
  1. May be inflexible for future
    service reinforcement or
    changes
  2. Does not provide physical
    protection to the cable sheath
    TDMM.* Page 12-3
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14
Q

Name 2 advantages of
aerial pathways.

A
  1. Usually can be installed
    quickly
  2. Are readily accessible for
    maintenance
    TDMM.* Page 12-5
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15
Q

Name 5 disadvantages of
aerial pathways.

A
  1. Affect the aesthetic appearance of the property
  2. Are subject to traffic and pedestrian clearances
  3. Could damage building exterior
  4. Are susceptible to environmental conditions
  5. Can be time consuming and expensive if “make ready” is required to attach to poles owned by others
    TDMM.* Page 12-5
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16
Q

Name 4 ways to bring
balanced twisted-pair cable
onto a customer’s property.

A

1 .Underground entrances
2.Buried entrances
3.Aerial entrances
4. Tunnel systems
TDMM.* Page 12-6

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17
Q

What factors are used to
determine how many
conduits and how large the
conduits need to be for a
given telecom
service entrance?

A

The number, size, and types of
cable to be used to serve the
telecommunications
service entrance
TDMM.* Page 12-6

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18
Q

What are BICSl’s
recommendations for the
number and size of
conduits for each
telecommunications
service entrance point?

A

Four 103 metric designator
(4 trade size) conduits
with at least one spare
103 metric designator
(4 trade size) conduit
TDMM.* Page 12-6

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19
Q

Why are innerducts
recommended when
optical fiber cables will be
used inside conduits?

A

Innerducts are used to ensure
that the maximum amount of
cables can be placed in
the conduit.
TDMM.* Page 72-6

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20
Q

Why is a copper conductor
added to a conduit that
contains optical fiber
cabling?

A

For locating purposes
TDMM.* Page 12-7

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21
Q

Why would an access
provider and customer-
owned cabling need to share
a telecommunications
service entrance?

A

To reduce installation costs
TDMM.* Page 12-71

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22
Q

Name 3 risks associated
with sharing an entrance
conduit.

A
  1. May reduce the access provider’s or the customer’s ability to provide additional cable into the EFS
  2. Could damage both cable sheaths by abrasion if they are not installed properly
  3. May not be permitted by the access provider and/or AHJ
    TDMM.* Page 12-7
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23
Q

True or False. The AP is
required to build the EF for
any facility where the AP
supplied the conduit from
the property line to
the building.

A

False. The AP does not have to
build the EF. In fact, in some
instances, the AP may have the
right to require the occupants to
build the EF.
TDMM.* Page 12-7

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24
Q

How many 90-degree
bends can be included
between pulling points
when installing
underground entrances?

A

No more than 2
TDMM.* Page 72-8

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25
True or False A 90-degree bend may be exceeded if innerduct is included in the conduit.
False. A 90-degree bend should never be exceeded. TDMM.* Page 12-8
26
How many conduits should a property owner provide from a point in the building to the property line if the building is not on the property line?
2 or more TDMM.* Page 12-8
27
Whom should you call before digging the pathway for direct-buried cabling?
The local underground utilities center TDMM.* Page 12-9
28
Name 3 methods that should be used to prevent a trench from caving in.
1 .Shoring 2.Sloping 3.Stepping (benching) TDMM.* Page 12-9
29
What is the maximum depth for the lower steps in a trench that is deeper than -1.52 m (5 ft)
-1.2 m (4 ft) TDMM.* Page 12-9
30
What is the minimum clearance from the edge of an excavated dirt pile to the nearest edge of a stepped trench that is deeper than -1.52 m (5 ft)
=0.6 m (2 ft) TDMM.* Page 12-9
31
What should be done to prevent a sunken trench appearance after the trench is refilled with the excavated dirt?
It should be tamped down, and the area should be revisited later to ensure that the trench is solid with the surrounding undisturbed earth. TDMM.* Page 12-9
32
Name 2 limitations for the use of an aerial entrance in a small building.
1 .Less than 300 pairs and 30.5 m (100 ft) less in length 2.No other telecommunications facility entrances TDMM.* Page 12-10
33
Name 5 problems that make aerial entrances "undesirable."
1 .Lack of mechanical protection for the facility 2. Effect on the aesthetics of the building 3.Clearance requirements 4.Storm-loading requirements 5.Possible path of electrical exposure allowing transient currents to enter the building TDMM.* Page 12-10
34
When an aerial entrance is used, what is the maximum span permitted between the last pole and the building?
-30.5 m (100 ft) TDMM.* Page 12-10
35
What is slack span construction?
A method of aerial cable installation that reduces tension, so no guying is required at either end TDMM.* Page 12-10
36
What is one of the main safety considerations associated with designing an aerial entrance?
Ensuring proper clearance and separation from electrical power lines and traffic TDMM.* Page 12-70
37
When the small-diameter drop method is used to attach aerial cable to a building, what is used to support the cable?
A drop hook attached to a conduit mast TDMM.* Page 72-12
38
When should the small- diameter drop method be used?
When there are only minimal circuit requirements TDMM.* Page 12-72
39
What is the maximum distance an aerial cable may extend above the roof line?
*101.6 mm (4 in) TDMM.* Page 12-72
40
What is a campus arrangement?
A large tract of land with multiple buildings rather than one high-rise building TDMM.* Page 12-15
41
True or False Individual buildings in a campus arrangement may be treated as stand-alone projects.
True. Individual buildings may be treated as stand-alone projects. They may also be treated as part of the overall design. TDMM.* Page 12-15
42
True or False If only one tenant occupies a campus arrangement complex, the main AP or WAN terminal for the complex may be located in one of the buildings.
True. If only one tenant occupies a campus arrangement complex, the main AP or WAN terminal for the complex may be located in one of the buildings. TDMM.* Page 12-15
43
True or False An easement should be applied for after excavation work on private property is finished.
False. Easements should be applied for and granted before any excavation work on private property begins. TDMM.* Page 12-16
44
What type of easement must be obtained when adjacent property owners will be affected by the work?
A perpetual easement TDMM.* Page 12-16
45
How are utility lines typically marked after they are located?
With marker paint, flags, and stakes TDMM.* Page 72-16
46
Name 6 negative consequences of utility disruption.
1 .Loss of life and/or injury 2.Service outages 3.Heavy fines for disrupting the contractor 4.Heavy construction fees to the disrupting contractor for damages 5.Damage to property 6.Loss of revenue for businesses TDMM.* Page 12-16
47
What telephone number is used in the United States to help companies locate underground facilities?
811 TDMM.* Page 12-76
48
True or False All utilities are required to participate in local one-call systems.
False. Utilities may not participate in one-call systems. Ask the local one call center which utilities participate. TDMM.* Page 12-17
49
What is the most critical factor to consider when you are determining the necessary level Of service diversity?
Balancing the cost versus the risk TDMM.* Page 12-17
50
When does full route diversity occur?
When there is a 100 percent physically separated route such that the damage to the first route cannot affect the second route TDMM.* Page 12-17
51
Where should the ICT designer consider installing dual service entrances?
In buildings that provide mission-critical continuous TDMM.* Page 12-18
52
True or False OSP cables are typically unlisted.
True. OSP cables are typically unlisted because of the sheath material and filling compounds used within the cables. TDMM.* Page 12-18
53
Where does BICSI recommend that unlisted OSP cable be terminated or transitioned to listed cable?
As close as practical upon entering the building TDMM.* Page 12-18
54
What may be done to extend the point of entrance when bringing unlisted OSP cable into a building?
Place the entire length of incoming cable within a rigid metallic conduit or intermediate metallic conduit. TDMM.* Page 12-18
55
What is the minimum required diameter for a post (bollard) that is being installed to protect termination equipment from motor vehicles and other moving equipment?
=101.6 mm (4 in) TDMM.* Page 12-20
56
How far should a post (bollard) that is being installed to protect termination equipment from motor vehicles and other moving equipment extend AFF or ground level?
At least 1067 mm (42 in) TDMM.* Page 12-20
57
What grade of plywood is required for the walls of spaces where OSP cables will be terminated?
AC grade or better TDMM.* Page 12-20
58
What determines the size of the room that will be used for terminating OSP cables?
*Type of facility *Terminating hardware selected *Necessity for electrical protection TDMM.* Page 12-21
59
Name 4 requirements for the door to the dedicated terminating space for OSP cable.
1 .Open outward 2.Be lockable with access control 3.Have the same fire-rating as the room wall 4.Be at least =0.91 m (3 ft) wide by zl .98 m (6.5 ft) high TDMM.* Page 12-21
60
How far should conduits entering a basement terminate from the finished wall?
=101.6 mm (4 in) TDMM.* Page 12-22
61
How far should conduits that enter from below grade extend above the finished floor?
=101.6 mm (4 in) TDMM.* Page 12-22
62
How far should conduits that enter through the ceiling terminate below the finished ceiling?
=101.6 mm (4 in) TDMM.* Page 12-22
63
Why should the end of the conduit that is inside the building be sealed?
To prevent rodents, water, and gases from entering the building TDMM.* Page 12-22
64
What is the point of connection between the AP network and private network?
Network interface (NI)/ demarcation point (DP) TDMM: Page 12-23
65
What is the main advantage of using a centralized NI panel or housing?
It offers the AP and private network owners a single, convenient test location for all premises circuits. TDMM.* Page 12-23
66
What is a possible disadvantage of locating a centralized NI panel in a secured area?
AP and private network owners may find access inconvenient if they are required to contact security or building engineers to access the panel. TDMM.* Page 12-23
67
What is a possible disadvantage of locating a centralized NI panel in an unsecured area?
Privacy and security could be compromised. Unauthorized personnel could easily access circuits and network media in an unsecured location. TDMM.* Page 12-23
68
What is soft digging?
The process of locating underground facilities through the use of nondestructive vacuum excavation TDMM.* Page 12-27
69
Name 3 methods for locating underground facilities.
1 .Electronic 2.Water vacuum 3.Air vacuum TDMM.* Page 12-27
70
What is the purpose of warning tape?
Helps to prevent accidental dig-up TDMM.* Page 12-27
71
What type of warning tape should be used with optical fiber cabling?
Detectable warning tape TDMM.* Page 12-27
72
What is the recommendation regarding the depth of a trench?
The minimum depth should allow for =610 mm (24 in) of cover from the top of the cable to final grade. TDMM.* Page 12-28
73
What is the minimum separation that must be maintained between a gas pipe and telecom cables when they cross in a trench?
-152 mm (6 in) TDMM.* Page 12-28, Table 12.3
74
What is the minimum separation that must be maintained between a street railway and telecom cabling in a trench?
1m (3.28 ft) below top of rail TDMM.* Page 12-28, Table 72.3
75
Why is a backhoe considered to be the most appropriate way to dig large trenches for multiple ducts or cables?
Because it requires the work area to be fenced in after working hours, which addresses the safety of the nearby community TDMM.* Page 12-30
76
Name 4 disadvantages associated with using a backhoe to dig trenches.
1 .Frequent repositioning to accommodate the backhoe's reach 2. Substantial space required beside the trench to temporarily hold excavated dirt 3. Extensive surface restoration requirements after installations are complete 4. Restriction to open areas TDMM.* Page 12-30
77
Name 3 alternatives to the traditional backhoe method for placing underground and direct-buried facilities.
1 .Compact trencher 2.Vibratory plow 3.Horizontal directional drilling TDMM.* Page 12-30
78
Why are different types of transmission media separated when they are installed in the same underground pathway?
Because separation provides: *Ready identification *Individual mechanical protection *Individual growth potential TDMM.* Page 12-32
79
How can you protect conduit that passes under roads, driveways, or railroad tracks?
Encase the conduit in concrete. TDMM.* Page 12-36
80
What should be done to prevent conduits from shearing?
Extend sleeves through the walls into the undisturbed earth. TDMM.* Page 12-36
81
Name 4 types of corrosion-resistant conduit.
1 .Fiber or fiberglass 2.Concrete 3.Rigid galvanized metal 4.Rigid and non-rigid non-metallic TDMM.* Page 12-36
82
How is most conduit listed?
By trade size TDMM.* Page 12-36
83
How many covers are required for an MH that measures between -3.7 m (12 ft) and =6.1 m (20 ft) long?
2 TDMM.* Page 12-42
84
How many covers are required for an MH that is longer =6.1 m (20 ft)?
3 TDMM.* Page 12-42
85
What marking is typically used for the cover of a telephone MH?
T TDMM.* Page 12-42
86
What does an S marking on an MH cover typically represent?
Signal TDMM.* Page 12-42
87
What does a C marking on an MH cover typically represent?
Communication TDMM.* Page 12-42
88
Where should the number for an MH be placed?
On the inside collar of the MH above the first step TDMM.* Page 12-42
89
Name 3 benefits of placing main conduit entry points at opposite ends of an MH.
1 .Allows for an organized cable formation 2.Maximizes the available working space at the center of the MH 3.Permits splaying the entry points in certain installations TDMM: Page 12-45
90
What is the strength requirement for concrete used for cast-in-place MHs?
24,132 kPA (3500 psi) TDMM.* Page 12-45
91
Why should precast MHS be used whenever possible?
For uniformity, economy, and installation efficiency TDMM.* Page 12-45
92
Name 2 instances when site-cast MHS should be used.
1 . The size required for the MH exceeds the precast sizes. 2.Obstructions prohibit the use of precast MHs. TDMM: Page 72-45
93
Name 4 factors that should be considered when selecting the permanent location for pole lines.
1 .Future road widening or expansion 2.Expansion of other utilities 3.Special problems 4.Safety and convenience of workers and the general public TDMM.* Page 12-46
94
Name 3 considerations for pole design.
1 .Pole-line classification 2.Storm loading 3.CIearance requirements TDMM.* Page 12-46
95
When should self- supporting cable be used instead of lashed?
*It is available in the required size. *There is no existing strand. *New cable cannot be lashed to an existing cable. *Adequate space exists for future growth. TDMM.* Page 12-46
96
What is basis of pole class designations?
Design load not exceeding a percentage of the breaking strength TDMM: Page 12-47
97
What type of loading refers to wind pressure on the attachments and aboveground portion of the pole?
Transverse storm loading TDMM.* Page 72-47
98
What is vertical loading?
The weight of the attachments and, on guyed poles, the vertical component of the tensions in the guys TDMM.* Page 72-47
99
What can create a bending moment on an aerial pole?
Eccentric loads or unbalanced tensions at unguyed corners and dead ends TDMM: Page 12-47
100
True or False The ICT designer is liable for reporting any existing hazard that must be corrected to the responsible utility company or owner.
True. The ICT designer is liable for reporting any existing hazard that must be corrected to the responsible utility company or owner. TDMM.* Page 12-48