Comprehensive Fiber Optic Installation and Theory Practice Flashcards

A comprehensive set of practice questions and answers covering fiber optic geometry, cable classifications, NEC standards, termination procedures, and testing metrics based on the lecture transcript.

What are the two most common types of multi-mode (MM) optical fiber?

$50/125$ and $62.5/125$

What multi-mode fiber type provides the highest bandwidth?

$$OM5$$

How is Single Mode (SM) fiber characterized regarding modal dispersion?

It typically has minimal or no amount of modal dispersion.

What colors are used to signify Single Mode fiber and laser-optimized multi-mode fiber in jacket coding?

Yellow for Single Mode and Aqua for laser-optimized multi-mode.

What is the buffer diameter for the outer layer of most indoor tight-buffered cables?

$$900\,\text{microns}$$

To what category of tolerance does fiber geometry belong?

Intrinsic tolerance

In which portion of the electromagnetic spectrum does fiber optic transmission take place?

The Infrared portion

What term describes the bending of a light wave caused by a change in speed when passing through different transparent media?

Refraction

What type of reflection is caused by an air gap when a connector plug is not fully inserted?

Fresnel Reflection

What ratio, expressed in $dB$, defines the power of the outgoing signal compared to the reflected signal?

Optical Return Loss

What is the relationship between wavelength and the number of modes in a fiber?

As the wavelength decreases, the number of modes increases.

How does the NEC define a Hybrid cable?

A cable that contains both Single Mode and Multi-mode fiber within the same jacket.

According to the NEC, what is a Riser cable?

A cable for vertical runs from floor to floor that is not low-smoke rated.

What does the acronym OFNP stand for?

Optical Fiber Non-conductive Plenum

What is the maximum length of an unrated cable allowed to enter a building before termination or transition?

$$50\,\text{feet}$$

What is the maximum fill ratio for a conduit containing only one cable?

$$53\%$$

What materials are used in loose-tube optic cables to prevent water intrusion?

Gels, tapes, or powders

Into what diameter protective tubes do fan-out kits branch $250\,\text{micron}$ fibers?

$$900\,\text{micron}$$

Which connector endface finish provides the lowest reflection?

APC (Angled Physical Contact)

To which part of the fiber is the ferrule typically bonded during assembly?

The Cladding

What is the required orientation of a cleaver blade relative to the fiber for a good cleave?

Perpendicular

How is power level below $1\,mW$ expressed in $dBm$?

As negative values

What is the TIA standard maximum insertion loss for a splice?

$$0.3\,dB$$

What is the ANSI commercial building standard for maximum insertion loss for a mated connector pair?

$$0.75\,dB$$

What unit of measurement is used when performing an acceptance test of an optical cable?

$$dB/km$$

What specific test is required for Tier 2 testing that is not in Tier 1?

OTDR (Optical Time Domain Reflectometer) testing

What is the wavelength range for a Visual Fault Locator (VFL)?

$630\,nm$ to $670\,nm$

Which single-mode wavelength has the lowest attenuation (loss)?

$$1550\,nm$$

What is the ideal wavelength for a Vertical-Cavity Surface-Emitting Laser (VCSEL)?

Below $850\,nm$

What is the government agency responsible for enforcing workplace safety rules?

OSHA

After installation, what is the typical minimum bend radius for a cable?

$10$ times the cable diameter

What are the first six colors in the standard 12-color coding sequence for fiber?

1. Blue, 2. Orange, 3. Green, 4. Brown, 5. Slate, 6. White

What are the final six colors (7 through 12) in the standard fiber color coding sequence?

7. Red, 8. Black, 9. Yellow, 10. Violet, 11. Rose, 12. Aqua