CFOT - Certified Fiber Optic Technician Installation and Hardware Questions and Answers

Question 1

An installer is pulling an outside plant (OSP) fiber optic cable with a 0.5-inch diameter through a conduit.
To prevent damage, what is the generally accepted minimum bend radius that must be maintained *during* the installation?

Accepted Answer

10 inches (20x the diameter)

Answer

5 inches (10x the diameter)

Answer

2.5 inches (5x the diameter)

Answer

15 inches (30x the diameter)

Question 2

A technician is installing fiber optic cable in a building's plenum spaces, which are used for environmental air circulation (HVAC). According to the National Electrical Code (NEC) Article 770, which cable rating is required for this application to minimize fire and smoke hazards?

Accepted Answer

OFNP (Optical Fiber Nonconductive Plenum)

Answer

OFNR (Optical Fiber Nonconductive Riser)

Answer

OFCG (Optical Fiber Conductive General-Purpose)

Answer

OFN (Optical Fiber Nonconductive General-Purpose)

Question 3

During a cable pull, a breakaway swivel is used as a crucial piece of hardware. What is the primary function of this device?

Accepted Answer

To disconnect the pull rope from the cable if the pulling tension exceeds a preset limit.

Answer

To prevent the cable from twisting as it is being pulled.

Answer

To allow multiple cables to be pulled simultaneously.

Answer

To automatically lubricate the cable as it enters the conduit.

Question 4

A technician is preparing to clean fiber optic connectors before mating them. Which of the following is considered a best practice in the 'wet-to-dry' cleaning method?

Accepted Answer

Wiping the connector end-face first on a solvent-dampened area of a lint-free wipe, then moving to a dry area of the same wipe.

Answer

Applying compressed air to the end-face immediately after the wet wipe.

Answer

Using a circular scrubbing motion with the wet wipe to remove stubborn contaminants.

Answer

Dipping the connector directly into a bottle of 99% isopropyl alcohol before wiping it dry.

Question 5

What is the primary safety concern a technician should be aware of when handling and disposing of bare fiber scraps after stripping and cleaving?

Accepted Answer

The glass shards are sharp and can easily penetrate skin or eyes, causing injury.

Answer

The scraps can become a source of harmful static electricity.

Answer

The scraps can emit residual light that is harmful to the retina.

Answer

The material is a chemical irritant that can cause a rash.

Question 6

A technician needs to organize and protect splices and terminations in an outdoor, aerial installation on a utility pole. Which type of hardware is specifically designed for this purpose?

Accepted Answer

A pole-mounted fiber optic enclosure.

Answer

A rack-mounted patch panel.

Answer

An indoor wall-mount enclosure.

Answer

A floor-standing demarcation box.