Brainscape's Knowledge GenomeTM

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


See full index

DB > TDMM Chapter 12 > Flashcards

TDMM Chapter 12 Flashcards

1
Q

Easement

A

A right acquired by one party to used land beloning to another for a specific purpose

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

HH

A

Handhole

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

Innerduct

A

Non metallic duct placed in a larger pathway

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

MH

A

Manhole

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

NI

A

Network Interface

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

OSP

A

Outside Plant

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

Service Diversity

A

The palcing of alternate facilities to temporarily replace main system in case of failure
(two internet services)

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

Underground Facilities

A

Cables in underground conduit with manholes, handholes or pull boxes to access them

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

Name three critical factors to consider when planning for maintenance and future growth for a facility where campus backbone cables exist

A
  • Familiarity with routes
  • Working and Spare capacity
  • Cable composition
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Name five advantages of underground conduits

A
  • Provide out of site service
  • Adaptable for future growth
  • Economical over long life
  • Provide cable protection
  • Minimizes repairs needed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Name four disadvantages of underground conduits

A
  • High installation cost
  • Require careful planning
  • Possible path for water or gas to enter building
  • More installation time than aerial or direct bury
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Name three advantages of direct bury

A
  • Provide out of site service
  • Low installation cost
  • Easy to move around obstructions
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Name two disadvantages to direct bury conduit

A
  • inflexible for future changes
  • No extra cable protection
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Name two advantages of aerial pathways

A
  • Quick installation
  • Readily accessible
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Name five disadvantages of aerial pathways

A
  • Ugly
  • Require clearances for people and traffic
  • Could damage building exterior
  • Environmental conditions could damage
  • Issues when poles are owned by others
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Name four ways to bring balanced twisted pair cable onto a customers property

A
  • Underground entrances
  • Buried entrance
  • Aerial entrances
  • Tunnel systems
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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 telecom service entrance

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

What are BICSIs recommendations for the number and size of conduits for each telecom service entrance point?

A

Four 4” conduits, with at least one spare

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

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

A

Innerduct ensures the maximum amount of cables can be placed in the conduit

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

Why is a copper conductor added to a condiot that contains fiber?

A

For locating purposes

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

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

A

To reduce installation costs

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

Name three risks associated with sharing an entrance conduit

A
  • Reduce ability to provide extra cable into the EF
  • Could damage cables with improper installation
  • May not be permitted by access provider or AHJ
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

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

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

A

No more than two

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

True or False
A 90 degree bend may be exceeded if innerduct is included in the conduit

A

False

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

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?

A

Two or More

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

Whom should you call before digging the pathway for direct bury cable?

A

Local underground utilities center

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

Name three methods that should be used to prevent a trench from caving in

A
  • Shoring
  • Sloping
  • Stepping
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What is the maximum depth for the lower steps in a trench that is deeper than 5ft?

A

4ft

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

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 5ft?

A

2ft

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

What should be done to prevent a sunken trench appearance after the trench is refilled with excavated dirt?

A

Tamped down then checked again later

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

Name two limitations for the use of an aerial entrance in a small building

A
  • Less than 300 pair and 100ft in length
  • No other telecom facility entrances
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Name five problems that make aerial entrances undesirable

A
  • Lack of mechanical protection for the facility
  • Ugly
  • Clearance requirements
  • Storm loading requirements
  • Path of electrical exposure
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

When an aerial entrance is used, what is the maximum space permitted between the last pole and the building?

A

100ft

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

What is slack span construction?

A

A method of aerial cable installation that reduces tension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What is one of the main safety considerations associated with designing an aerial entrance?

A

Proper clearances and separation from electrical power lines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

When the small diameter drop method is used to attach aerial cable to a building, what is used to support the cable?

A

A drop hook attached to a conduit mast

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

When should the small diameter drop method be used?

A

When there are only minimal circuit requirements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

What is the maximum distance an aerial cable amy extend above the roof line?

A

4in

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

What is a campus arrangement?

A

A large tract of land with multiple buildings rather than one high rise building

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

True or False
Individual buildings in a campus arrangement may be treated as stand alone projects

A

True

42
Q

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?

A

True

43
Q

True or False
An easement should be applied for after excavation work on private property is finished

A

False

44
Q

What type of easement must be obtained when adjacent property owners will be affected by the work?

A

A perpetual easement

45
Q

How are utility lines typically marked after they are located?

A

With marker paint, flags and stakes

46
Q

Name six negative consequences of utlity disruption

A
  • Injury
  • Service outage
  • Heavy fines for disrupting contractor
  • Heavy construction fees
  • Damage to property
  • Loss of revenue for business
47
Q

What telephone number is used in the united states to help companies locate underground facilities?

A

811

48
Q

True or False
All utlities are required to participate in local one call systems?

A

False

49
Q

What is the most critical factor to consider when you are determining the necessary level of service diversity?

A

Balance cost versus risk

50
Q

When does full route diversity occur?

A

When there is a one hundred percent physically separated route such that the damage to the first route cannot affect the second route

51
Q

Where should the ICT designer consider installing dual service entrances?

A

In buildings that provide mission critical continuous services

52
Q

True or False
OSP cables are typically unlisted

A

True

53
Q

Where does BICSI recommend that unlisted OSP cable be terminated or transitioned to listed cable?

A

As close as practical to the building entrance

54
Q

What may be done to extend the point of entrance when bringing unlisted OSP cable into a building?

A

Place the entire length of incoming cable within a conduit

55
Q

What is the minimum required diameter for a post that is being installed to protect termination equipment?

A

4in

56
Q

How far should a post that is being installed to protect termination equipment extend AFF?

A

At least 42in

57
Q

What grade of plywood is required for the walls of spaces where OSP cables will be terminated?

A

AC Grade or better

58
Q

What determines the size of the room that will be used for terminating OSP cables?

A
  • Type of facility
  • Terminating hardware selected
  • Necessity for electrical protection
59
Q

Name four requirements for the door to the dedicated terminating space for OSP cable

A
  • Open outward
  • Be lockable with access control
  • Have the same fire rating as the room wall
  • Be at least 3ft wide by 6.5ft tall
60
Q

How far should conduits entering a basement terminate from the finished wall?

A

4in

61
Q

How far should conduits that enter from below grade extend above the finished floor?

A

4in

62
Q

How far should conduits that enter through the ceiling terminate below the finished ceiling?

A

4in

63
Q

Why should the end of the conduit that is inside of the building be sealed?

A

To prevent rodents, water, gas from entering the building

64
Q

What is the point of connection between the AP network and private network?

A

Network Interface (NI) / Demarcation Point (DP)

65
Q

What is the main advantage of using a centralized NI panel or housing?

A

Offers the AP and private network owners a single convenient test location for all premesis circuits

66
Q

What is a possible disadvantage of locating a centralized NI panel in a secured area?

A

Access could be inconvenient if security or building engineers have to unlock panel

67
Q

What is a possible disadvantage of locating a centralized NI panel in an unsecured area?

A

Privacy and Security could be compromised

68
Q

What is soft digging?

A

Locating underground facilities through vacuum excavation

69
Q

Name three methods for locating underground facilities

A
  • Electronic
  • Water vacuum
  • Air vacuum
70
Q

What is the purpose of warning tape?

A

Helps prevent accidental dig up

71
Q

What type of warning tape should be used with fiber?

A

Detectable warning tape

72
Q

What is the recommeded depth of a trench?

A

24in from top of cable to final grade

73
Q

What is the minimum separation that must be maintained between a gas pipe and telecom cables when they cross in a trench

A

6in

74
Q

What is the minimum separation between a street railway and telecom cabling in a trench

A

3.28ft

75
Q

Why is a backhoe considered to be the most appropriate way to dig large trenches for multiple ducts or cables?

A

It requires work area to be fenced in after hours, keeps everything safer

76
Q

Name four disadvantages with using a backhoe to dig trenches

A
  • Requires frequent repositioning
  • Space required around trench
  • Extensive surface restoration
  • Restriction to open areas
77
Q

Name three alternatives to the traditional backhoe method for placing underground facilities

A
  • Compact trencher
  • Vibratory plow
  • Horizontal directional drilling
78
Q

Why are different types of transmission media separted when they are installed in the same underground pathway?

A

Separation provides:
- Ready identification
- Individual protection
- Individual growth potential

79
Q

How can you protect conduit that passes under roads, driveways or railroad tracks?

A

Encase in concrete

80
Q

What should be done to prevent conduits from shearing?

A

Extend sleeves through walls into the undisturbed earth

81
Q

Name four types of corrosion resistant conduit

A
  • Fiberglass
  • Concrete
  • Rigid Galvanized Metal
  • Rigid and non rigid metal
82
Q

How is most conduit listed?

A

By trade size

83
Q

How many covers are required for an MH that measures between 12ft and 20ft long?

A

Two

84
Q

How many covers are required for an MH that is longer than 20ft?

A

Three

85
Q

What marking is typically used for the cover of a telephone MH?

A

T

86
Q

What does an S marking on an MH represent?

A

Signal

87
Q

What does an C marking on an MH represent?

A

Communication

88
Q

Where should the number for an MH be placed?

A

On the inside collar above the first step

89
Q

Name three benefits of placing main conduit entry points at opposite ends of an MH

A
  • More organized cable
  • Maximizes working space
  • Premits splaying the entry points
90
Q

What is the strength requirement for concrete using cast in place manholes?

A

3500 psi

91
Q

Why should precast MH be used whenever possible?

A

Uniformity, economy and installation efficiency

92
Q

Name two instances when site cast MHs should be used

A
  • Size exceeds precast availability
  • Obstructions prohibit use of precast
93
Q

Name four factors that should be considered when selecting the permanent location for pole lines

A
  • Future road widening
  • Expansion of other utlities
  • Special problems
  • Safety and convenience of workers and public
94
Q

Name three considerations for pole design

A
  • Pole line classification
  • Storm loading
  • Clearance requirements
95
Q

When should self supporting cable be used instead of lashed?

A
  • If available in required size
  • No existing strand
  • New cable cannot be lashed to an existing
  • Adequate space for future growth
96
Q

What is the basis of pole class designations?

A

Design load not exceeding a percentage of the breaking strength

97
Q

What type of loading refers to wind pressure on the attachments and aboveground portion of the pole?

A

Transverse storm loading

98
Q

What is vertical loading?

A

The weight of the attacments and vertical components of the tension in guyed poles

99
Q

What can create a bending moment on an aerial pole?

A

Eccentric loads or unbalanced tensions

100
Q
A

DB (19 decks)

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