BICSI Certification BICSI Fiber Optic Systems 1 — Questions and Answers
Question 1: What is the core diameter of a standard OM4 multimode optical fiber?
- 9 µm
- 50 µm (Correct answer)
- 62.5 µm
- 100 µm
Correct answer: 50 µm
OM4 multimode optical fiber has a core diameter of 50 µm and is optimized for use with 850 nm VCSELs.
Question 2: Which type of optical fiber connector is specified by ANSI/TIA-568 as the standard for horizontal backbone cabling?
- ST connector
- SC connector (Correct answer)
- LC connector
- FC connector
Correct answer: SC connector
The SC (Subscriber Connector) duplex connector is specified by ANSI/TIA-568 as the standard for optical fiber horizontal backbone cabling.
Question 3: What is the maximum insertion loss allowed for a single fusion splice in an optical fiber backbone link?
- 0.1 dB (Correct answer)
- 0.3 dB
- 0.5 dB
- 1.0 dB
Correct answer: 0.1 dB
BICSI and ANSI/TIA standards allow a maximum insertion loss of 0.1 dB per fusion splice in optical fiber backbone links.
Question 4: What does 'OM5' designate for optical fiber, and what is its primary advantage?
- A new singlemode fiber optimized for 1310 nm
- A wideband multimode fiber supporting multiple wavelengths between 850–953 nm (Correct answer)
- A bend-insensitive singlemode fiber for FTTH
- A 100 µm core fiber for high-power applications
Correct answer: A wideband multimode fiber supporting multiple wavelengths between 850–953 nm
OM5 is a wideband multimode fiber that supports multiple wavelengths between 850 and 953 nm, enabling wavelength division multiplexing (WDM) for higher capacity.
Question 5: In optical fiber testing, what does OTDR stand for and what is its primary purpose?
- Optical Time Domain Reflectometer; locates faults and measures fiber length and loss (Correct answer)
- Optical Transmission Data Recorder; logs daily throughput data
- Optical Transceiver Data Reader; reads SFP module parameters
- Output Test and Diagnostic Report; summarizes test results
Correct answer: Optical Time Domain Reflectometer; locates faults and measures fiber length and loss
An OTDR (Optical Time Domain Reflectometer) sends pulses into a fiber and measures reflected light to locate faults, splices, and connectors, while measuring fiber length and loss.
Question 6: What is the nominal attenuation of OS2 single-mode fiber at 1310 nm?
- 3.5 dB/km
- 1.0 dB/km
- 0.4 dB/km (Correct answer)
- 0.2 dB/km
Correct answer: 0.4 dB/km
OS2 single-mode fiber has a nominal attenuation of approximately 0.4 dB/km at 1310 nm as specified in ITU-T G.652D and ANSI/TIA standards.
BICSI Certification BICSI Fiber Optic Systems 1
What is the core diameter of a standard OM4 multimode optical fiber?