DCI Study Guide 2026
Everything you need to pass the DCI exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 DCI Exam Format at a Glance
📚 DCI Topics to Study (70)
✍️ Sample DCI Questions & Answers
1. Which fall protection measure is required when working on a ladder that extends more than 4 feet above a lower level?
OSHA requires ladders to be secured at the top, bottom, or both to prevent slipping or tipping when extended above 4 feet.
2. What is the TIA-568 maximum allowable permanent link length for Category 6 horizontal cabling?
TIA-568 limits the permanent link (from telecommunications outlet to patch panel) to 90 meters, with the remaining 10 meters allocated for patch cords.
3. What is the purpose of a Job Hazard Analysis (JHA) performed before starting a cabling installation?
A JHA systematically identifies hazards associated with each job task and establishes safe work procedures to mitigate those risks.
4. When using a visual fault locator (VFL) on a fiber, a bright red glow is visible through the jacket. What does this indicate?
A VFL emits visible red light; if it escapes through the jacket it means the fiber is losing light at that point due to a bend, break, or mechanical fault.
5. Which method is used to join fiber optic cables in an outside plant environment where a permanent, low-loss connection is required?
Fusion splicing provides the lowest loss and most durable permanent joint for outside plant applications by welding the glass fibers together.
6. While using an extension ladder to access a ceiling pathway, what is the proper safety protocol regarding the ladder's position?
A key rule for extension ladder safety is that the ladder must extend at least three feet (about 1 meter) above the upper landing surface to provide a secure handhold for climbing on and off.