ATP Structured Cabling & Connectivity 3

Question 1

Which type of fiber optic cable is designed for long-distance backbone runs exceeding 2 km and uses a 9/125 µm core/cladding specification?

Accepted Answer

Single-mode (OS2)

Answer

OS2 single-mode fiber with a 9/125 µm specification supports transmission distances well beyond 2 km and is used for campus and long-haul backbone applications.

Question 2

In TIA-568 structured cabling, what does 'ELFEXT' measure?

Accepted Answer

Equal Level Far-End CrossTalk, measuring far-end crosstalk relative to insertion loss

Answer

ELFEXT (Equal Level Far-End CrossTalk) measures far-end crosstalk normalized against insertion loss, providing a true signal-to-interference ratio at the far end.

Question 3

A technician is terminating a 110-style punch-down block. Which tool is required for proper termination?

Accepted Answer

110 punch-down tool with 110 blade

Answer

A 110 punch-down tool with the correct 110-style blade is required; using a 66-blade or Krone blade will result in improper termination and potential damage to the IDC connector.

Question 4

What is the maximum pulling tension allowed for a 4-pair Cat 6 UTP cable during installation?

Accepted Answer

25 lbf (110 N)

Answer

TIA-568 limits maximum pulling tension to 25 lbf (110 N) for 4-pair UTP cable to prevent stretching the conductors and degrading electrical performance.

Question 5

Which structured cabling standard defines the specifications for telecommunications pathways and spaces (cable trays, conduits, equipment rooms)?

Accepted Answer

TIA-569

Answer

TIA-569 (Commercial Building Standard for Telecommunications Pathways and Spaces) governs the physical spaces and pathways through which cabling is routed.

(ATP) Accredited Tier Professional Certification (Cooling & Refrigeration) Practice Test

(ATP) Accredited Tier Professional Certification (Cooling & Refrigeration) Practice Test

ATP Structured Cabling & Connectivity 3