Fiber Optics – Light Brigade Practice Test

These questions are part of the practice quiz. Start practicing

• What is the only thing a continuity tester tests for in optical fibers?
• Which statement correctly describes the purpose of slack or service loops in fiber installs?
• The most common method of installing aerial cables for telephone and CATV organizations?
• What term defines defects that result from poor polishing, fiber misalignment, poor cleave angles, and poor cleaning practices?
• Which instrument is used to visually inspect the endface of fiber optic connectors for defects?
• Which statement best describes the relationship between wavelength and speed in fiber optics?
• Which option is NOT a method to reduce modal dispersion in a multimode fiber?
• True or False: The OTDR measures cable length.
• What is the difference between optical return loss (ORL) and reflectance?
• Which option best describes safe debris management for fiber work areas?
• Index matching gel reduces which type of reflection?
• Which statement combines the tight-buffered and loose-buffered coating diameters correctly?
• What color is used for a UPC single-mode connector?
• Which figure shows the recommended polishing pattern for hand polishing a multimode connector?
• In what year was the first North American commercial fiber optic system installed?
• What is a composite cable?
• Which standard defines the maximum splice loss referenced earlier?
• Which color is associated with UPC single-mode connectors and what effect does it have?
• The mode field diameter is most closely associated with which type of fiber?
• Which instrument is primarily used to measure optical loss along a fiber by time-domain reflections?
• Hardened connectors are typically used in what type of application?
• What is the generally accepted dynamic bend radius of fiber optic cable?
• Which set lists four desirable factors to look for in a connector?
• What is the ITU-T G.671 attenuation value for single-mode connector attenuation?
• What are the three functions of the fiber coating?
• Which set represents the three primary wavelength windows in a fiber optic system?
• Two common splice protector designs are heat shrink and butterfly.
• What is the recommended containment choice for fiber debris?
• What are three primary methods for underground installation of fiber optic cable?
• In fiber optic conduit installation, the term 'fill ratio' refers to the relationship between which two cross-sectional areas?
• What is a mid-span entry?
• Which option is NOT one of the three primary underground installation methods?
• Which acronym corresponds to a code associated with outside plan codes?
• What simple device is used to locate faults in the OTDR deadzone?
• Air Blown Fiber installations use what medium to move the fiber and reduce tension?
• What does the acronym ITU represent?
• What does a fanout kit do?
• Which of the following options correctly lists a commonly used single-mode wavelength pair?
• What does Rack Unit primarily describe in a rack system?
• Which statement about break away swivels is true when used with the proper rated device?
• What is the ITU designation for standard single-mode fiber?
• What safety form must be available for review when working with chemicals?
• The standard outside diameter of the fiber cladding is 125 um. Which component does this refer to?
• What is the outside coating diameter of the fiber in tightbuffered cables?
• Which dispersion type increases with core size and is a primary factor in multimode fibers?
• Central tube and stranded refer to what type of cable construction?
• What type of panel can be used as a central access location for testing and troubleshooting?
• Which deployment has returned fixed V-groove alignment fusion splicers to prominence?
• True or false: Improper bending of an optical fiber will decrease the tensile strength of fibers.
• What are the names of the two types of indoor tight buffered cables?
• Which pair lists the two most commonly used multimode core sizes?
• A poor cleave angle causes what type of loss?
• Great care should be provided when dressing splice sleeves and fibers to prevent inducing what?
• What unit is used to measure and express wavelengths?
• Which statement best describes the relationship between ORL and reflectance?
• Which statement best describes ADSS cables?
• In field installations, how are most single-mode fibers terminated?
• What information is contained in the NESC?
• Which code is associated with electrical safety in building installations?
• What is the purpose of OTDR averaging mode?
• Maxcell bags were designed not only to separate and maximize duct space but also to decrease cable friction.
• What type of fibers are OM3 and OM4 fibers?
• True or False: It is recommended to always confirm that transmitting devices are turned off before an endface inspection.
• Which statement correctly describes field termination of most single-mode fibers?
• Which organization standards define the 12-color fiber color code?
• What type of test equipment can measure both ORL and reflectance?
• What do gels, tapes, and powders in fiber protect against?
• HASB stands for what?
• Which dispersion is a combination of material and waveguide dispersion and affects single-mode fiber?
• Mechanical splicing is most common in emergency restoration applications.
• Which standard set governs the installation of cable management products in commercial premises?
• What are the three types of fusion splicer technologies?
• What is the maximum splice loss specified by Telcordia GR-20 and GR-765?
• What is the typical ferrule diameter for most small form factor connectors?
• Fusion splicing is the primary solution for single-mode applications.
• Regarding endface inspection safety, which action is recommended?
• From which material are most precision ferrules made?
• What is the outside diameter of single-mode and multimode fiber claddings?
• Which statement describes the relationship between wavelength and mode count in a fiber?
• What will happen to the number of modes as the wavelength decreases?
• Do fiber identifiers work with multimode fiber?
• Which of the following options correctly lists a commonly used multimode wavelength pair?
• What type of reflection is caused by an air gap in a connector pair?
• True or False: All wavelengths travel at the same speed through the fiber.
• Which statement about the fiber coating is true?
• Where are minor defects allowed on the surface of the ferrule?
• How often is the NEC reissued?
• What fiber optic test equipment is required for calibration traceable to the National Institute of Standards Technology?
• What is the role of a Kellems grip?
• What is recommended to have for future changes and restorations?
• Which factor refers to reflections at interfaces within the fiber?
• What should a cable installer be aware of when installing fiber optic cables into a conduit?
• What will a blue UPC or a green APC connector reduce?
• ITU-T G.652D is classified as low water peak or zero water peak single-mode fiber.
• Which organization specifies a 0.50 value for single-mode connector attenuation?
• Which practice supports safe endface inspection?
• Which OM fiber categories are tested with LED sources for LAN testing?
• Which statement is true about patch panel cable management?
• When securing cables with tie wraps, should the cables still be able to move freely?
• Which four OTDR settings are commonly considered essential?
• Which containment method is recommended for fiber optic debris?
• What is the best way to safely contain fiber shards, scraps, or debris?
• Shorter wavelengths are more dangerous at lower power levels.
• Which standard is used for laser safety in North American fiber optic communications?
• Which of the following best describes the purpose of the duct plugs?
• What are the most common multimode core diameters?
• Which safety precaution should be taken during endface handling?
• Which factor describes the spreading of a signal as it travels through a fiber?
• What is the main benefit of a HASB installation?
• True or False: the damage that tight tie wraps can cause is not limited to breakage, most often it causes a significant reduction signal, requiring unnecessary troubleshooting and network downtime.
• What cable management product has both splicing and connector functions?
• Which unit is commonly used to express optical power in small-signal receivers?
• Which problem can result from using overly tight tie wraps on fiber cables?
• What should be done to all connectors prior to plugging them into any components or test equipment?
• Which item is used to convert 250um to 900um?
• Index matching gel reduces Fresnel reflection.
• Installers must consider building codes when installing premises fiber optic cables.
• Which function is described by the phrase 'Tones/Locate light fiber'?
• What type of light sources are used to test LANs for OM1 and OM2 fibers?
• The cladding is bonded to which part of a connector?
• True or False: "Not to exceed" charts help to quickly determine if the total loss of span meets the required end-to-end loss specifications and individual component values.
• Which is the twelfth color in the standard color code?
• What type of OTDR measurements require the correct fiber index of refraction value?
• The arc temperature or burn-back test should be conducted as needed, but specifically any time there is a humidity or altitude change. Which of the following is true?
• Which set correctly lists the three primary wavelength windows in a fiber optic system?
• Which statement is accurate about armored outdoor fiber cables?
• Which two statements are true?
• In North America, which standard applies to laser safety for fiber optic communications?
• What is the maximum fill percentage by cross-sectional area for a conduit with one cable?
• Micro-bends can occur due to compression or pinching from which components?
• If a cable contains metallic elements, what safety action must be performed?
• Which two wavelengths are used when measuring single-mode fiber spans?
• What are the three ways to reduce modal dispersion in a multimode system?
• ITU-T G.55 is single-mode fiber that was optimized for 1550-nm transmissions.
• What instrument is used to visually inspect fiber optic connector endfaces?
• In OTDR testing, which value must be set correctly to ensure accurate length calculations?
• Armored cable design protects against rodent damage and what else?
• Is strain relief a requirement for fiber and cable management products?
• What is the North American laser safety standard for fiber optic communication systems?
• In optical fiber terminology, what is a mode?
• Achieving a good cleave requires the cleaving blade be held at what angle to the fiber?
• What does a splice closure do?
• If infrared light is used, what region of the spectrum does fiber optics reside in?
• True or False: Visual fault locators verify damage in the form of light leakage.
• Optical fibers are immune to interference from which phenomena?
• Which wavelength has the lowest attenuation?
• What is the bending of light called?
• What is the diameter of the fiber used in an air blown fiber installation?
• What color is used for multimode cordage?
• Which of the following lists the 12 colors identified in the fiber color code standards?
• If a cable has any metallic components at termination point, what does the NEC require?
• Before inspecting a fiber optic endface, which action should be taken?
• What is the ITU designation for single-mode bend-insensitive fiber?
• ADSS stands for?
• What two wavelengths do multimode fibers most commonly use?
• How will a mechanical splice or a connector show up on the OTDR display?
• IOR stands for the ratio of speed of light in a vacuum to the speed of light in what material?
• What is a primary purpose of Maxcell bags?
• What type of fibers are OM1 and OM2 fibers?
• Which statement about multimode fiber wavelengths is true according to common practice?
• Which statement best identifies the appropriate safety standard for fiber optic laser systems in North America?
• Which launch condition helps minimize modal dispersion in multimode attenuation testing?
• Which material is commonly used for precision ferrules to ensure stability and machinability?
• Sequential markings on outside of cable jackets help technicians estimate which characteristic?
• What is the maximum pull tension for traditional outside plant cables?
• What does RU denote?
• What is a deadzone in fiber testing?
• In what spectrum of light do the fiber optic wavelengths take place?
• In single-mode fiber, which dispersion mechanism primarily causes pulse broadening?
• What standards are used for premise installations of cable management products?
• What function does a fiber identifier serve?
• What is a fault locator used to locate within a fiber optic network?
• Which laser classification designates a retina-safe laser?
• What type of tests use total fiber distance and decibels per kilometer?
• Which statement correctly describes cable construction and bend characteristics?
• What preliminary step should be performed on all connectors before mating to ensure quality?
• Optical loss test sets are the only equipment that truly measures end-to-end loss. True or False?
• True or False: 80% of the light travels in the core of a single-mode fiber and 20% travels in the inner cladding that is defined as the mode field diameter.
• Which statement best reflects the North American standard for fiber optic laser safety?
• What two wavelengths do single-mode fibers most commonly use?
• What does NEC stand for?
• Which dispersion type affects multimode fiber and is directly related to the larger core size?
• What does the acronym OFNR signify?
• Which of the following is NOT a fusion splicer technology?
• What is the dynamic bend radius for fiber optic cable expressed as a multiple of outside diameter?
• What do breakout kits do?
• What part of the electromagnetic spectrum is used by fiber optic systems?
• What are the 'three Cs' of an optical fiber?
• Which instrument is used to locate faults along a fiber by analyzing reflections?
• The outside coating diameters are expressed in which unit?
• Which device is used to locate faults by emitting a bright visible light along the fiber?
• Which of the following is not one of the three Cs of an optical fiber?
• What are the three critical factors to consider when working with a fiber optic network?
• Which mode on an OTDR is used to obtain attenuation and reflection measurements more reliably?
• Armored cable is designed to prevent damage from which of the following?
• In what mode do optical power meters measure power?
• What type of light sources are used to test LANs for OM3 and OM4 fibers?
• What unit denotes the size of a fiber's core, cladding, and coating?
• Which panel type functions as both a splice and connector distribution point in a fiber management system?
• Why should installers consider building codes when performing fiber installations?
• Does light have a higher or lower frequency than radio waves?
• The polishing pattern used for hand-polishing a multimode connector is illustrated by which figure?
• What does OTDR stand for?
• What is the maximum connector insertion loss allowed for commercial buildings according to TIA-568?
• Which OM fiber categories allow LED Mandrel or VCSEL as sources for LAN testing?
• Which type of premises cable installation uses compressed air to reduce tension on the cable?
• Two important considerations when installing an aerial fiber optic cable?
• Which statement is true regarding moisture protection in fiber installations?
• Which of the following lists the three fusion splicer technologies?
• Are fiber identifiers effective with multimode fiber?
• What must installers consider when planning fiber optic cable installations?
• What is the ferrule diameter of most small form factor connectors?
• The loss that results from poor polishing, cleaving, or cleaning is classified as extrinsic.
• Which component is designed to enclose splices and protect the fiber connections from environmental exposure?
• Which option correctly matches a blue UPC single-mode connector with its purpose?
• What do the sequential markings on the cable help the installer determine?
• When dressing fibers into patch panels, is it important to keep fibers inside the internal cable management to prevent micro-bends caused by panel doors, latches, or other hardware?
• What type of test equipment is used to test for total distance and provide attenuation values for fiber loss per kilometer, splice, connector, and total span loss?
• Which launch conditions are used to perform multimode attenuation tests?
• What is the NEC 50 foot rule?
• What does OTDR stand for?
• Which standard governs North American laser safety for fiber optic systems? (Reframed with different wording)
• Most single-mode fibers are terminated before they are spliced to the cable ends using what method?
• Which factor is used to quantify the loss of signal strength in a fiber optic link?
• Which piece of test equipment uses a red laser light?
• What two types of transmitting light sources can a multimode fiber use?
• What is the outside coating diameter of the fiber in loose buffered cables?
• In terms of bend radius and tension, how do dynamic and static differ?
• True and false: Different wavelengths travel at different speeds through a fiber.
• MPO and MTP connectors are also known by which term?
• True or False: A Fresnel reflection spike on an OTDR trace indicates a location of a connector or splice.
• What are the two most common multimode wavelengths?
• What two wavelengths are used when measuring multimode fiber spans?
• What should be done to all connectors before testing?
• OM3 and OM4 fibers are described as which type?
• Duct plugs are designed to prevent which of the following?
• What color is used for single-mode cordage?
• Do light waves have a longer or shorter wavelength than radio waves?
• Which phrase represents the NESC?
• Which installation method is most common for aerial cables in telecom and CATV?