FOI Examination

In what year was the first North American fiber optic telephone system, carrying commercial telephone traffic, installed? A. 1927 B. 1947 C. 1977 D. 1987

What are the three most common wavelength windows used for communications through optical fibers? A. 810 nm, 1300 nm, 1500 nm B. 810 nm,1345 nm, 1550 nm C. 850 nm, 1300 nm, 1550 nm D. 850 nm, 1345 nm, 1500 nm

Attenuation in optical fiber is lowest at ______. 850 nm 900 nm 1300 nm 1550 nm

Absolute power in optical fiber is specified as? A. dBm B. dB C. amplitude D. EMP

What absolute power value is Zero dBm referenced to? A. 0 ps B. 0 mW C. 1 mW D. 1nm

A simple fiber optic system would consist of ______. A. Transmitter, receiver, optical fiber, LED B. transmitter, receiver, laser, connectors C. transmitter, receiver, optical fiber, connectors D. transmitter, receiver, optical fiber, light source

Fiber optic transmission takes place in the ___ portion of the spectrum. A. ultraviolet B. subsonic C. infared D. none of the above

Light is electromagnetic energy with a ____ frequency and ___ wavelength than radio waves. A. higher, longer B. lower, shorter C. lower, longer D. higher, shorter

When light passes from one transparent medium to another transparent medium that has a different refractive index, the light wave bends. This is called ____. A. reflection B. mirroring C. refraction D. Faraday reflection

A connector that has not been fully inserted into the mating sleeve, results in an air gap that produces a _____. A. fresnel reflection B. concentricity loss C. elipticity loss D. core diameter mismatch

The number of modes in an optical fiber increases as the _____ decreases. A. wavelength B. frequency C. core D. cladding

One way to reduce modal dispersion is to ________. A. lower the wavelength B. use a smaller core C. increase the cladding diameter D. use a larger core

What government agency writes and enforces safety rules at the workplace? A. ANSI B. FCC C. FAA D. OSHA

Per ANSI/TIA-568, unless color coding is used for some other purpose, what color should identify a single mode fiber connectors strain relief, adapter housing, and plug body? A. Black B. Blue C. Green D. Beige

Different wavelengths of light travel at _____ speeds through the glass. A. equal B. different C. inverse D. parallel

What type of cable, as defined by the NEC, is a factory assembly of one or more optical fibers having an overall covering and containing no electrically conductive materials? A. conductive B. composite C. nonconductive D. hybrid

Single-mode fiber optic systems typically use ____ light sources. A. light emitting diode B. laser diode C. Vertical Cavity Surface Emitting Lasers D. gas laser

Improper bending of an optical fiber will _____ the tensile strength. A. decrease B. increase C. not change D. increase, depending on the size of the core

What is a “mode” in optical fiber? A. a light trace B. a light wavelength C. a light source D. a light path

Attenuation (loss) is specified as ______. A. dBm B. dB C. microns D. megabits

What are the two most common multimode wavelengths? A. 810 nm, 1300 nm B. 810 nm, 1550 nm C. 850 nm, 1300 nm D. 1300 nm, 1550 nm

Single-mode systems usually operate at what wavelengths? A. 850 nm, 1345 nm B. 850, 1500 nm C. 850 nm, 1300 nm D. 1310 nm, 1550 nm

Which part of the multimode optical fiber has the lowest refractive index? A. core B. cladding C. coating D. buffer

In this cross section of a multi-mode fiber, the cladding is represented by which layer? A. A B. B C. C D. none of these

When visually inspecting the endface of a connector with an inspection microscope, where are minor defects allowed? A. inner cladding B. outer core C. outer cladding D. inner core

What are the two most common multimode optical fiber types? A. 8/125 and 6.25 µm B. 62.5/125 and 50/125 µm C. 85/125 and 100/140 µm D. 85/125 and 200/240 µm

Graded index fiber uses numerous concentric layers of glass to reduce ____ dispersion. A. material B. phototonic C. spectral D. modal

This fiber is designated by the ISO/IEC 11801 specification This fiber is designated by the ISO/IEC 11801 specification. The fibers designated as OM1 and OM2 are generically known as ____ fibers and were designed for use with LED light sources. A. legacy multimode B. laser optimized multimode C. G.652 standard single-mode D. G.655 non-zero disperson shifted

OM3 and OM4 multimode fibers are commonly known as _____ fibers. A. legacy multimode B. laser optimized multimode C. G.652D low water peak D. G.655 non-zero dispersion shifted

In cordage, what color signifies single-mode fiber? A. gray B. orange C. green D. yellow

The buffer of a fiber used in tight buffered cable or cordage is typically _____ in diameter and is applied directly to the outer coating layer of the optical fiber? A. 125 microns B. 250 microns C. 900 microns D. 1000 microns

What is the name of indoor tight-buffered “non-breakout” style cable? A. distribution B. loose tube C. breakout D. zipcord

What type of cable, as defined by the NEC, contains both optical fibers and current-carrying electrical conductors within the same jacket? A. hybrid B. loose tube C. non-conductive D. composite

What is the maximum fusion splice loss as specified by the Telcordia GR-20 and GR-765 recommendations? A. .05 dB B. .10 dB C. .03 dB D. .50 dB

What does the acronym “OFNR” stand for? A. Optical Fiber Non-Conductive Radiation B. Optical Fiber Non-Conductive Riser C. Optical Fiber No rating D. Optical Fiber Non-Resistant

The gel/tape/powder in a loose tube fiber optic cable protects the optical fiber from ___ should the sheath or jacket fail. A. rodents B. water C. light D. air

As defined in ANSI/TIA-598, the color coding used on premises cable jackets typically indicates the type of fiber they contain. What type of multimode optical fiber would be contained in a cable with an aqua jacket? A. 50/125 µm non-laser-optimized B. 50/125 µm laser optimized C. 62.5/125 µm D. 100/140 µm

The NEC defines a fiber optic cable that is “fire retardant and low smoke” as a ____ rated cable. A. general purpose B. riser C. pentium D. plenum

Which component of the connector is the optical fiber’s cladding typically bonded to during the assembly process? A. body B. boot C. cap D. ferrule

Blue shroud Physical Contact (PC) or a green shroud Angled Physical Contact (APC) ferrule finishes offer a significant reduction in ______. A. reflectance B. splice loss C. attenuation D. connectorization

One of the recognized connectors cited in the ANSI/TIA-568 standard is pictured in this picture. What type is it? A. FDDI B. ST C. SC D. LC

One of the recognized connectors cited in the ANSI/TIA-568 standard is pictured in this picture. What type is it? A. FDDI B. MPO/MTP Array C. SC D. LC

The ANSI/TIA-568 used for commercial buildings specifies the maximum insertion loss for a mated connection pair as ____. A. 0.50 dB B. 0.75 dB C. 1.00 dB D. There is no specification for maximum insertion loss

What pattern of polishing is generally used with hand polishing? A. circular B. oval C. figure eight D. convenient

Precision fiber connector ferrules are mostly made out of what material? A. ceramic B. aluminum C. plastic D. steel

All connections should be ____ prior testing. A. cleaved B. cleaned C. conditioned D. polished

A cable’s sequential markings are useful in determining the approximate _____ of the cable. A. diameter B. length C. strength D. flammability

Most small form factor connectors use this diameter ferrule. A. 1.25 mm B. 2.0 mm C. 2.5 D. 3.0

Infared lasers are not visible to the unaided eye therefore, they ______. A. cannot hurt your eyes B. are not used in fiber optic communication systems C. can be dangerous to your eyes D. are only used in commercial electronics

What type of loss can be greatly reduced by using an optically transparent index-matching gel having a refractive index the same as or very near that of the optical fibers? A. macrobend B. Rayleigh scattering C. Fresnel reflection D. microbend

The splicing environment must be kept as _____ as possible. A. comfortable B. clean C. quiet D. centrally closed

The loss resulting from mated fiber ends that are not perpendicular to the fiber’s axis and are not lined up with one another due to a poor cleave angle is an example of ____ loss. A. intrinsic B. external C. extrinsic D. internal

Most single-fibers are terminated with factory fabricated ____ and spliced to the cable’s fibers. A. attenuators B. pigtails C. jumpers D. terminators

To achieve a good cleave it is essential that the scoring blade in a cleaver be held ____ to the optical fiber. A. parallel B. diagonal C. perpendicular D. oblique

When preparing to install a fiber optic cable in a conduit you must be aware of the maximum _____ percentage by cross-sectional area as defined in the NEC. A. fill ratio B. bend radius C. tensile strength D. operational temperature

A panel is used to provide a central location for cross connecting, monitoring or testing fiber is a ___. A. splice panel B. vault C. patch panel D. pedestal

What kind of cable kit branches the fibers contained in a loose tube fiber optic cable into 900 micron outside diameter protective tubes? A. break-out kits B. mid-entry kits C. fan-out kits D. emergency restoration kits

Per the NEC, what is the maximum fill ratio percentage by cross-sectional area for a conduit with one cable? A. 31% B. 40% C. 50% D. 54%

If the cable has metallic members, what does the NEC require at termination points? A. cable strain relief B. bonding to ground C. proper bend radius D. heat shrink exposed elements

Installers must consider which of the following when installing fiber optic cables? A. building codes B. altitude and humidity C. topology D. geology

The NEC is updated every ___ years. B. 3 C. 4 D. 5

When installing cable, it is recommended that ____ be available for future changes and restorations? A. slack B. slices C. personnel D. connectors

If the bend radius of a cable is not known, what is the generally accepted dynamic bend radius? A. 10 times the cable diameter B. 20 times of the cable diameter C. 30 times the cable diameter D. 40 times the cable diameter

What does the Acronym “NEC” stand for? National Energy Coalition National Electronics Council National Electrical Commission National Electrical Code

A. article 250 B. article 300 C. article 568 D. article 770 Which article of the NEC requires that any electrically conductive materials that are likely to become energized, like metal armor and or metal strength members of an optical fiber cable, shall be bonded and grounded at the point of entrance into a building or residence? A. article 250 B. article 300 C. article 568 D. article 770

In the NEC article it states unlisted conductive and nonconductive outside plant optical cables shall be permited to be installed in the building structure, where the length of the cable within the building, measure from its point of entrance, does not exceed ____ and the cable enters the building from the outside and is terminated in an enclosure. 10 m (33 feet) 15 m (50 feet) 20 m (66 feet) 30 m (98 feet)

What instrument is used for testing of fiber spans and includes loss per kilometer and total distance of span measurements? A. optical loss test sheets B. optical spectrum analyzer C. optical time domain reflectometer D. optical channel checkers

What instrument is used for the visual inspection of fiber optic endfaces? A. Power Meter B. Inspection Scope C. OTDR D. Identifier

A continuity tester tests only for ____ in the optical fiber. A. macrobends B. microbends C. breaks D. wavelengths

Light sources used to test multimode Local Area Networks (LANS) normally use what type of electro optical component? A. SOA lasers B. LED or VCSEL C. DFB Lasers D. Fabrey-Perot lasers

Which of the following types of test equipment typically use a red (635-650 nm) laser light source? A. VFL B. Continuity Tester C. Fiber Identifier D. OTDR

What safety forms must be available when chemicals are used? A. ABF B. HUD 233 C. MSDS D. 1040 EZ

What is the best way to dispose of waste fiber ends? A. A trash can which has plastic liner B. The floor, if regular janitorial service is available C. A covered container clearly marked for fiber optic waste. D. A splice closure with contains a special pocket made specifically for this purpose.

What class of laser has the lowest power and the fewest hazards associated with it? A. Class 1 (I) B. Class 2 (II) C. Class 3a (IIIA) D. Class 4 (IV)

In ANSI/TIA-598 twelve color codes. Fill In the missing sequence 1.______ 7. Red 2 ______ 8. Black 3. Green 9. Yellow 4. Brown 10. Violet 5. Slate 11. _____ 6. ______ 12. Aqua a. Rose, Grey, White, Blue b. Blue, Orange, White, Rose c. Rose Turquoise, white, orange d. Blue White, Orange, Rose

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