blue box questions

The portion of the spectrum where fiber optic transmission wavelengths are contained is the _________.

A. Subsonic
B. Infrared
C. Sound
D. Cosmic ray

Identify the cross section of an optical fiber labeled B as shown below:

A. Core
B. Cladding
C. Jacket

Identify the cross section of an optical fiber indicated as shown below:

A. Core
B. Cladding
C. Jacket

Reflectance is measured as a ratio of reflected power to incident power and is expressed in:

A. dBr
B. dBi
C. dB
D. dBm

Light of different wavelengths travels at ________ speeds in the same material (i.e. glass).

A. Faster
B. Slower
C. Different
D. The same

The ratio of the velocity of light in a vacuum to the velocity of light in a different medium such as glass is called:

A. Reflection Ratio
B. Spectral Ratio
C. Index of Refraction
D. Index of Reflection

Total Internal Reflection (TIR) only occurs when the light beam travels from a material with a ________ refractive index to a material with a ________ refractive index.

A. Higher; Lower
B. Lower; Higher

A __________ in fiber optics, simply put, is a light path.

A. Band
B. Group
C. Stream
D. Mode

Which of the following are the two most common multi-mode fibers used for short distance transmission?

A. 62.5μm/125μm and 8.3μm/125μm
B. 50μm/125μm and 62.5μm/125μm
C. 62.5μm/50μm and 8.3μm/50μm
D. 50μm/50μm and 62.5/50μm

As the wavelength decreases, the number of modes in an optical fiber __________.

A. Decreases
B. Increases
C. Stays the same

What type of fiber is used for long-haul telecommunications?

A. Multi-mode
B. Single-mode
C. Graded mode
D. Polarized mode

When the bend radius of a fiber cable is not known or not specified, the installer should use which of the following for dynamic bend radius?

A. 3 times the diameter
B. 5 times the diameter
C. 10 times the diameter
D. 20 times the diameter

A ____________ is used to remove higher order modes when testing multimode fibers.

A. EMD conditioner
B. Mandrel Wrap
C. Attenuator
D. Filter

What component of a fiber optic system converts electrical pulses to light pulses and transmits them down a fiber?

A. Transmitter
B. Receiver
C. Oscillator
D. Photodetector

Both LEDs and LDs operate in the _________ wavelengths making them dangerous to the eye because they are not visible.

A. Infrared
B. Above infrared
C. MW
D. FM

What is the most common LASER Diode used for single mode fiber optic systems?

A. Tube type LASER diodes
B. Distributed Feedback (DF) LASER diode
C. Fabry-Perot (FP) LASER diode
D. Vertical Cavity Surface Emitting LASER (VSCEL)

Which of the following wavelengths is best suited for the VSCEL diodes?

A. 1300nm
B. 1300μm
C. 850nm
D. 850μm

What safety rating do Class 1 lasers have?

A. Visible lasers
B. Medium-power laser that can emit dangerous radiation levels
C. Very high-power laser that can cause permanent eye damage
D. Very low-power laser considered being inherently safe

What passive optical device is used to reduce the power level of an optical signal without distorting it and is typically used at the receiver to protect sensitive photodiodes?

A. Filter
B. Isolator
C. Attenuator
D. Coupler

Which of the following statements is NOT true regarding connectors?

A. Connectors are used mostly on patch panels, adapters and test equipment interfaces.
B. Connectors can provide low losses and high reflected power when installed correctly.
C. Connectors provide convenient testing points.
D. Connectors are always used as permanent joints between two fibers.

What component in an optical connector is the cladding of a fiber bonded to during the assembly process?

A. Cladding housing
B. Connector housing
C. Connector Sub-assembly
D. Ferrule

Is it necessary to clean a fiber connector every time you break and make a connection using the same two connectors?

A. Yes
B. No

Mating adapters required to connect to male gender connectors together will result in an air gap causing _______ to occur if the connectors are not fully inserted into the adapter.

A. Dispersion
B. Fresnel Reflection
C. Fresnel Refraction
D. Absorption

What type of ferrule polish provides the lowest back reflection?

A. PC
B. FLAT PC
C. RPC
D. APC

The TIA/EIA 568A standard specifies the maximum insertion loss for each connection of a mated connector and sleeve pair at:

A. 1.25dB
B. 0.75dB
C. 2.0dB
D. 1.0dB

The best connectorization technique for single mode fibers is using factory machine pre-polished pigtails.

A. True
B. False

Identify the type of connector shown below:

A. ST
B. SC
C. Biconic
D. MPO/MTP

Identify the type of connector shown below:

A. ST
B. SC
C. LC
D. FC

Identify the type of connector shown below:

A. MPO/MTP
B. LC
C. FC
D. Biconic

Identify the type of connector shown below:

A. SC
B. ST
C. FC
D. LC

What type of fiber termination method might result in a fiber type mismatch condition?

A. MPO/MTP
B. Splice on using pigtails
C. Anaerobic Epoxy Quick Cure
D. Crimp-on

Fresnel Reflection caused by an air gap between two connectors will not affect the operation of a laser transmitter.

A. True
B. False

Tight Buffer coated fibers are typically referred to as:

A. 250 micron fibers
B. 500 micron fibers
C. 800 micron fibers
D. 900 micron fibers

Primary buffered fibers housed in loose plastic tubes filled with water-blocking gel, tapes, or powders to prevent water intrusion are referred to as:

A. Tight Buffered Cables
B. Loose Tube Cables
C. Distribution Cables
D. Breakout Cables

Indoor, tight buffered, "non-breakout" cables that can be directly terminated to patch panels are referred to as:

A. Distribution cables
B. Breakout cables
C. Loose tube
D. Zip Cord cable

A hybrid cable contains both single-mode and multi-mode fibers in the same cable jacket...

A. True
B. False

Which of the following MM (multi-mode) fibers listed in the ANSI/TIA-598 standard is contained in an aqua colored jacket?

A. 62.5/125μm
B. 50/125μm non-laser optimized
C. 50/125μm laser optimized
D. 8.3/125μm

Of the following must-mode fibers, which one supports the highest bandwidth?

A. OM1
B. OM2
C. OM3
D. OM4

The 62.5/125μm fiber is designated as:

A. OM1
B. OM2
C. OM3
D. OM4

The OM5 designation is used to describe what type of multimode fiber?

A. 62.5/125μm fiber designed for LED light source
B. LASER optimized wideband muli-mode fiber
C. LED optimized Wideband multi-mode fiber
D. 50/125μm fiber, laser optimized

What color cordage is used to designate single-mode jumpers?

A. Orange
B. Aqua
C. Yellow
D. White

What color cordage is used to designate multi-mode jumpers?

A. Orange
B. Aqua
C. Yellow
D. White

Which of the following is used to connect horizontal or backbone cables to an arrangement of fixed connectors enabling easier distribution and test access?

A. Cable vault
B. Fan out or Breakout kit
C. Patch Panels
D. All of the above

Which of the following provides a means to connect fibers between an OSP loose tube cable and an indoor distribution cable?

A. Fan out or Breakout Kit
B. Splice enclosure
C. Cable vault
D. Any of the above

The NEC and CEC code only apply to public premise installations. Private premise installations rely only on local building codes.

A. True
B. False

What is the maximum fill ratio in a conduit defined by NEC as a percentage by the cross-sectional area?

A. 48%
B. 53%
C. 62%
D. 75%

NEC Article 250 requires any cable that contains any metallic members or conductors that can be electrically energized to be ________ at the point of entrance into a building or residence.

A. Bonded and grounded
B. Flagged with a red warning sticker
C. Shielded
D. All of the above

According to NEC Article 770, OSP cables shall be permitted to be installed inside a building so long as they do not exceed what length?

A. 30 meters (98 feet)
B. 25 meters (82 feet)
C. 20 meters (66 feet)
D. 15 meters (50 feet)

When a cable contains metallic members, NEC requires bonding and grounding at ALL termination points.

A. True
B. False

The NEC cable marking OFNP denotes an Optical Fiber ___________ cable.

A. Non-Conductive Plenum
B. Non-Plenum
C. Non-Conductive outside Plant
D. Non-Conductive Private

The NEC cable marking "OFNR and OFCR" identifies a riser cable approved for vertical applications between floors of a building. However, OFNP and OFCP cables can also be used for riser application as they have a higher fire resistance and low smoke rating.

A. True
B. False

What type of cable is defined by NEC as a cable containing optical fibers and no metallic electrically conductive materials or conductors?

A. Non-Polarized
B. Non-Metallic
C. Non-Conductive
D. Composite

Sequential markings on a cable can be used to determine the length of a cable remaining on the cable reel.

A. True
B. False

When installing cables in a building, it is important to consider both electrical and building codes.

A. True
B. False

Installers should consider fiber cable slack at splice points to allow for future maintenanceepairs, moves, adds, and changes.

A. True
B. False

The minimum bend radius of a fiber cable after it is installed should not exceed:

A. 10 times the diameter
B. 15 times the diameter
C. 20 times the diameter
D. 25 times the diameter

The working bend radius of a fiber cable while pulling should not exceed:

A. 10 times the diameter
B. 15 times the diameter
C. 20 times the diameter
D. 25 times the diameter

The TIA/EIA Standard 568A specifies the maximum allowable splice loss at:

A. 1.0dB
B. 0.60dB
C. 0.30dB
D. 0.75dB

What insertion loss is specified by ANSI/TIA 568 standard for fusion spliced SM fibers when tested by an OTDR?

A. 0.01dB
B. 0.1dB
C. 0.3dB
D. 0.75dB

In order to achieve a good cleave, the scoring blade in a cleaver must be placed ____________ to the fiber.

A. Diagonally
B. Parallel
C. Perpendicular
D. In any position next

A good splice is dependent on a clean work environment free of dust.

A. True
B. False

Which of the following is NOT an example of an intrinsic type of splice loss?

A. Bad Cleave
B. Core diameter mismatch
C. Core/Cladding concentricity error
D. Numerical Aperture Mismatch

Which of the following factors is NOT an example of extrinsic type of splice loss?

A. Fiber geometry
B. Axial Run-Out
C. Misalignment
D. Air Gap

Which of the following is the government agency regulates workplace safety and health?

A. ANSI
B. TIA
C. OSHA
D. WHAS

Infrared lasers are not visible, therefore they can be dangerours to the unaided eye. Never look at the end of a fiber attached to an infrared light source.

A. True
B. False

When cleaving and cutting fiber, fiber waste ends should be disposed of in:

A. An open container
B. A plastic container
C. A covered container
D. The technician's pocket for later disposal

What should always be available for quick reference whenever chemicals such as epoxies and solvents are being used during splicing?

A. Material Safety Data Sheets
B. Splicing machine manufacturer phone number
C. Splicing Machine serial number
D. Mechanical splice model numbers