OSP Aerial Plant & Pole Line Design 2

Question 1

What is the standard span length for aerial telecommunications cable in typical suburban environments?

Accepted Answer

125 to 150 feet

Answer

50 to 75 feet

Answer

100 to 150 feet

Answer

200 to 250 feet

Question 2

In aerial plant design, what is a 'dead-end' pole?

Accepted Answer

A pole where cable tension is terminated and not passed through to the next span

Answer

A pole at the end of a road with no future expansion

Answer

A pole that has exceeded its rated load capacity

Answer

A pole with no guy wire attachments

Question 3

The NESC loading districts (Light, Medium, Heavy) are used to account for which environmental factor in aerial plant design?

Accepted Answer

Ice and wind loading on cables and structures

Answer

Wind speed only

Answer

Temperature variation only

Answer

Solar radiation and UV exposure

Question 4

What is the purpose of a 'stub pole' in aerial plant construction?

Accepted Answer

A pole installed beside a deteriorating pole to transfer its loads

Answer

A temporary pole used only during cable installation

Answer

A short pole section added to extend the height of an existing pole

Answer

A decorative pole used at property boundaries

Question 5

What is the minimum separation typically required between power supply conductors and communication cables on a shared utility pole (NESC communications worker safety zone)?

Accepted Answer

40 inches

Answer

12 inches

Answer

2 feet

Answer

6 inches

Question 6

In pole line design, what does 'H-frame' construction refer to?

Accepted Answer

Two poles connected by a crossarm at the top forming an H shape

Answer

A single pole with horizontal crossarms

Answer

A helical ground anchor used for guying

Answer

A horizontal duct bank at pole base level

Question 7

What is 'initial sag' versus 'final sag' in aerial cable design?

Accepted Answer

Initial sag is measured at installation; final sag accounts for long-term creep and loading effects

Answer

Initial sag applies to the messenger; final sag applies to the lashed cable

Answer

Initial sag is the design value; final sag is what is actually installed

Answer

Initial sag is measured in summer; final sag is measured in winter