VDV Fiber Optics 2

Question 1

Which splicing method typically produces the lowest insertion loss in single-mode fiber?

Accepted Answer

Fusion splice

Answer

Fusion splicing melts fiber ends together creating a near-seamless joint, typically yielding losses below 0.1 dB.

Question 2

What is the primary purpose of an optical time-domain reflectometer (OTDR)?

Accepted Answer

Locate faults and measure loss along a fiber link

Answer

An OTDR sends pulses into the fiber and analyzes backscattered light to locate faults, splices, and measure distance-based loss.

Question 3

What does 'bend radius' refer to in fiber optic installations?

Accepted Answer

The minimum curve radius a fiber can be bent without excessive signal loss

Answer

Exceeding the minimum bend radius causes microbending loss as light escapes the core through the cladding.

Question 4

Which fiber optic connector type uses a push-pull latching mechanism and is common in data center applications?

Accepted Answer

LC connector

Answer

LC (Lucent Connector) uses a push-pull latch similar to an RJ-45 and has a small form factor suited for high-density data center use.

Question 5

What does 'numerical aperture' (NA) describe in a fiber optic cable?

Accepted Answer

The light-gathering ability and acceptance cone of the fiber

Answer

Numerical aperture defines the half-angle of the cone of light a fiber can accept, determined by the refractive index difference between core and cladding.

(VDV) Voice Data Video Technician Certified Practice Test

(VDV) Voice Data Video Technician Certified Practice Test

VDV Fiber Optics 2