OSP Fiber Optic & Copper Cabling Systems 2

Question 1

What is the primary advantage of using loose-tube construction in outdoor fiber optic cables compared to tight-buffered construction?

Accepted Answer

Better resistance to temperature extremes and moisture ingress

Answer

Loose-tube construction allows fibers to float in gel or dry water-blocking material, providing superior protection against temperature cycling and moisture ingress in outdoor environments.

Question 2

When performing an OTDR trace on a fiber span, a reflective spike followed by a loss event typically indicates:

Accepted Answer

A fiber connector or open end reflection

Answer

A reflective spike (Fresnel reflection) on an OTDR trace is characteristic of a connector, cleaved end, or mechanical splice where there is an air gap causing back-reflection.

Question 3

Which copper cable configuration is MOST susceptible to cross-talk interference in a dense multi-pair outside plant environment?

Accepted Answer

Unshielded twisted pair with identical twist rates across all pairs

Answer

Pairs with identical twist rates run parallel to each other for long distances, creating maximum coupling and cross-talk between pairs; varying twist rates reduce this interference.

Question 4

In a fiber optic OSP design, the term 'optical budget' refers to:

Accepted Answer

The maximum allowable power loss between transmitter and receiver

Answer

Optical power budget is the difference in dB between the transmitter output power and the minimum receiver sensitivity, representing the maximum tolerable link attenuation.

Question 5

A central office engineer needs to run a new copper cable through an existing conduit that already contains a filled cable. What is the primary concern?

Accepted Answer

Exceeding conduit fill ratio and heat buildup from increased cable mass

Answer

Conduit fill ratio limits must be respected to maintain cable pulling tension limits and prevent overheating from reduced airflow around cables.

(OSP) Outside Plant Designer Practice Test

(OSP) Outside Plant Designer Practice Test

OSP Fiber Optic & Copper Cabling Systems 2