BICSI Installer 2 Optical Fiber

What is the core diameter of OM3 multimode fiber?

• A8.3 micrometers
• B50 micrometers
• C62.5 micrometers
• D125 micrometers

What is the primary difference between singlemode and multimode optical fiber?

• ASinglemode fiber is always plastic while multimode is always glass
• BSinglemode fiber has a smaller core that supports only one mode of light propagation, ena…
• CMultimode fiber supports higher data rates than singlemode at all distances
• DSinglemode and multimode fibers have identical performance characteristics

What connector type is most commonly used in modern high-density fiber installations?

• AST (Straight Tip)
• BSC (Subscriber Connector)
• CLC (Lucent Connector)
• DFC (Ferrule Connector)

What is the typical wavelength used for multimode fiber transmission?

• A850 nm and 1300 nm
• B1310 nm and 1550 nm
• C1490 nm and 1625 nm
• D400 nm and 700 nm

What is the purpose of fusion splicing in fiber optic installation?

• ATo terminate fiber with a connector
• BTo permanently join two fiber ends by melting them together with an electric arc
• CTo test fiber continuity
• DTo polish the fiber end face

What does an OTDR (Optical Time Domain Reflectometer) measure?

• AThe optical power output of a laser source
• BThe location and magnitude of events (splices, connectors, breaks, bends) along a fiber b…
• CThe bandwidth capacity of a fiber link
• DThe color of light transmitted through the fiber

What is the minimum bend radius for indoor tight-buffered fiber cable under no-load conditions?

• A5 times the cable outside diameter
• B10 times the cable outside diameter
• C15 times the cable outside diameter
• D25 times the cable outside diameter

What is the maximum pulling tension for a fiber optic cable during installation?

• AIt is the same for all fiber cables at 25 lbf
• BIt varies by cable type and is specified by the cable manufacturer, typically between 100…
• CFiber cables can withstand unlimited pulling tension
• D50 lbf for all indoor fiber cables

What is the difference between OS1 and OS2 singlemode fiber?

• AOS1 is multimode and OS2 is singlemode
• BOS1 is tight-buffered for indoor use; OS2 is loose-tube with lower attenuation for outdoo…
• COS1 and OS2 are identical in performance
• DOS2 has a larger core diameter than OS1

What tool is used to inspect the end face of a fiber connector for contamination and defects?

• AAn OTDR
• BA fiber inspection microscope (video probe)
• CA visual fault locator
• DAn optical power meter

What is the proper procedure for cleaning a fiber connector end face?

• ABlow on it to remove dust
• BUse dry cleaning first (lint-free wipe or click cleaner), then wet-dry clean if contamina…
• CUse a cotton swab dipped in water
• DRub it on clothing fabric

What is the MPO/MTP connector and where is it primarily used?

• AA single-fiber connector used for outdoor installations
• BA multi-fiber push-on connector that terminates 8, 12, or 24 fibers in a single ferrule,…
• CA copper connector used for PoE applications
• DA weatherproof connector for direct burial applications

What does the term 'optical loss budget' mean?

• AThe financial cost of fiber optic components
• BThe total allowable optical power loss between the transmitter and receiver for a link to…
• CThe amount of light generated by the laser source
• DThe budget allocated for OTDR testing

What is a visual fault locator (VFL) and what is it used for?

• AA device that measures optical power in milliwatts
• BA visible red laser that helps identify fiber path, breaks, tight bends, and bad connecti…
• CA device that locates copper cable faults
• DA software tool that simulates fiber optic networks

What is the maximum attenuation coefficient for OS2 singlemode fiber at 1310 nm?

• A0.4 dB/km
• B1.0 dB/km
• C3.0 dB/km
• D3.5 dB/km

What safety hazard is associated with optical fiber installation?

• AElectrical shock from fiber cables
• BFiber shards from cleaving can penetrate skin and eyes, and laser light can cause eye dam…
• CToxic gases emitted by fiber cable
• DExcessive heat generated by fiber transmission

What is the typical insertion loss for a mated pair of LC connectors?

• A0.10 dB
• B0.20 dB
• C0.75 dB
• D1.5 dB

What is the difference between tight-buffered and loose-tube fiber cable construction?

• ATight-buffered is for outdoor use; loose-tube is for indoor use
• BTight-buffered has a 900 μm coating directly on the fiber for indoor use; loose-tube has…
• CBoth constructions are identical in performance
• DLoose-tube cables cannot be spliced

What is a mechanical splice and when is it used?

• AA permanent connector crimped onto the fiber end
• BA device that aligns and holds two fiber ends together without fusion, used for temporary…
• CA tool for cutting fiber to a specific length
• DA method for polishing fiber connectors

What is modal dispersion and which fiber type is affected?

• ASignal distortion in singlemode fiber caused by wavelength variations
• BSignal spreading in multimode fiber caused by different light modes traveling at differen…
• CPhysical damage to the fiber core from excessive tension
• DColor distortion in plastic optical fiber

What is the maximum distance for 10GBASE-SR over OM3 multimode fiber?

• A100 meters
• B300 meters
• C550 meters
• D2000 meters

What is the proper technique for cleaving fiber before fusion splicing?

• ACut the fiber with cable cutters
• BScore the fiber with a precision cleaver to produce a flat, perpendicular end face with m…
• CSand the fiber end with fine-grit sandpaper
• DHeat the fiber end with a torch to melt it smooth

What safety classification system is used for laser sources in fiber optic equipment?

• ANFPA fire ratings
• BIEC 60825 laser safety classification (Class 1, 1M, 2, 3R, 3B, 4)
• CUL listing categories
• DOSHA hazard communication classifications

What is the purpose of index-matching gel in fiber optic connections?

• ATo lubricate the connector for easier insertion
• BTo reduce Fresnel reflections at the air gap between fiber end faces by matching the refr…
• CTo permanently bond two fibers together
• DTo protect the fiber from UV light damage

What is the TIA-568.3 standard specifically about?

• ACopper cabling component specifications
• BOptical fiber cabling and components standard
• CTelecommunications pathways and spaces
• DCable administration and labeling

What is an OTDR dead zone and why is it important?

• AA section of fiber that cannot transmit data
• BThe minimum distance after a reflective event where the OTDR receiver is saturated and ca…
• CA section of fiber with zero attenuation
• DThe area around the OTDR that is unsafe due to laser radiation

What is the purpose of a launch fiber (also called a launch cable or pulse suppressor) in OTDR testing?

• ATo increase the OTDR's output power
• BTo move the OTDR dead zone away from the first connector of the fiber under test, allowin…
• CTo convert multimode signals to singlemode
• DTo reduce the testing time

What is macrobending loss in optical fiber?

• ALoss caused by fiber manufacturing defects
• BLight loss that occurs when fiber is bent beyond its minimum bend radius, causing light t…
• CLoss caused by contaminated connectors
• DAttenuation that occurs naturally over long fiber lengths

What is the difference between APC (Angled Physical Contact) and UPC (Ultra Physical Contact) fiber connectors?

• AAPC has a flat polished end face; UPC has a curved end face
• BAPC has an 8-degree angled end face that reduces back reflections; UPC has a slightly cur…
• CAPC is for multimode only; UPC is for singlemode only
• DThere is no functional difference between the two

What is the proper method for attaching the pull rope to a fiber cable during installation?

• ATie the pull rope directly to the fiber strands
• BAttach the pull rope to the cable's strength member (aramid yarn) using a pulling grip or…
• CTape the pull rope to the cable jacket
• DThread the pull rope through the cable's buffer tubes

What OM designation refers to laser-optimized 50 μm multimode fiber designed for 10 Gbps applications at extended distances?

• AOM1
• BOM2
• COM3
• DOM4

What is the purpose of an optical power meter in fiber testing?

• ATo measure the electrical power consumed by fiber equipment
• BTo measure the optical power level (in dBm) at a specific point in the fiber link
• CTo generate test signals for OTDR testing
• DTo polish fiber connector end faces

What is a fiber optic splice enclosure (splice closure) used for?

• ATo terminate fibers with connectors
• BTo protect and organize fusion or mechanical splices in a sealed, environmentally protect…
• CTo amplify optical signals at long distances
• DTo convert fiber signals to copper

What is the Tier 1 (basic) fiber certification test method?

• AOTDR testing only
• BInsertion loss and length testing using a light source and power meter
• CVisual inspection only
• DBandwidth testing with a network analyzer

What color jacket identifies OM3 laser-optimized multimode fiber cable per TIA-598?

• AOrange
• BAqua
• CYellow
• DBlue

What is the typical fusion splice loss for singlemode fiber when performed by a skilled technician?

• A0.02-0.05 dB
• B0.1-0.3 dB
• C0.5-0.75 dB
• D1.0-2.0 dB

What is the maximum splice loss allowed per TIA-568.3 for a single fusion splice?

• A0.05 dB
• B0.1 dB
• C0.3 dB
• D0.75 dB

What is OM5 (wideband) multimode fiber designed to support?

• AVoice-only telecommunications over very long distances
• BShort-wavelength division multiplexing (SWDM) using multiple wavelengths between 850-953…
• COnly single-wavelength transmission at 1550 nm
• DExclusively outdoor installations in extreme temperatures