Practice Test Geeks(VDV) Voice Data Video Technician Certified Practice Test
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Cabling Infrastructure Flashcards

7 cards from real VDV practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the maximum pulling tension allowed for a 4-pair UTP Cat6 cable during installation?

    Answer: 25 lbf

    ANSI/TIA-568 specifies a maximum pulling tension of 25 lbf (110 N) for 4-pair UTP horizontal cabling to avoid stretching or damaging the pairs.

  2. Which conduit fill percentage is recommended by NEC for three or more conductors in a single conduit?

    Answer: 31%

    NEC Chapter 9 Table 1 limits conduit fill to 40% for two conductors and 31% for three or more conductors to allow heat dissipation and ease future pulls.

  3. A technician is installing cable in a plenum space. Which cable jacket rating is required?

    Answer: CMP

    CMP (Communications Plenum) rated cable is required in air-handling spaces because it produces minimal smoke and flame spread when burned.

  4. What minimum bend radius must be maintained for a Cat6A UTP cable during installation?

    Answer: 8 times the cable diameter

    TIA-568-C.2 requires a minimum bend radius of 8 times the cable outer diameter for Cat6A UTP during and after installation to preserve signal integrity.

  5. In a structured cabling system, what is the purpose of the Intermediate Distribution Frame (IDF)?

    Answer: To serve as a sub-distribution point connecting floor-level equipment to the MDF

    The IDF (also called a Telecommunications Room) aggregates horizontal cabling from work area outlets on a floor and connects back to the MDF via backbone cabling.

  6. When installing a cable tray, what is the standard maximum fill capacity by cross-sectional area according to NEMA VE-1?

    Answer: 50%

    NEMA VE-1 specifies that cable trays should not exceed 50% fill of their cross-sectional area to allow airflow, ease maintenance, and future cable additions.

  7. Which type of grounding conductor is used to bond telecommunications equipment racks to the building's ground system per TIA-607?

    Answer: Telecommunications Bonding Backbone (TBB)

    The Telecommunications Bonding Backbone (TBB) connects Telecommunications Grounding Busbars (TGB) in each telecom room back to the TMGB, forming the main grounding path.