VDV Blueprint Reading & Job Planning

Question 1

On a drawing with a scale of 1/8" = 1'-0", a cable run measures 3 inches. What is the actual length?

Accepted Answer

24 feet

Answer

At 1/8" = 1 ft, each inch equals 8 feet. So 3 in × 8 ft/in = 24 feet.

Question 2

Where should a technician look first to identify what a symbol on a telecommunications floor plan means?

Accepted Answer

The drawing legend or symbol schedule

Answer

The legend (symbol schedule) defines every symbol and abbreviation used on that drawing set. Symbols can vary between design firms, so the legend is the authoritative reference.

Question 3

If the project drawings and the written specifications conflict about the cable category required, what is the proper action?

Accepted Answer

Submit a Request for Information (RFI) to the engineer or designer for clarification

Answer

Conflicts in the contract documents should be resolved formally through an RFI to the design professional. That creates a documented answer before work goes ahead and prevents costly rework.

Question 4

What are 'as-built' drawings?

Accepted Answer

Drawings updated to show how the system was actually installed

Answer

As-builts record the installation as it was actually completed, including field changes, final cable routes, and outlet locations and labels. They are essential for future maintenance and moves/adds/changes.

Question 5

When doing a cable takeoff from plans, why do installers add footage beyond the measured route length?

Accepted Answer

To cover service loops, vertical drops, and termination slack

Answer

Plan measurements show horizontal routing only. Real runs also need vertical drops to outlets, rises to racks, service loops, and slack at the termination, so a percentage or fixed allowance is added.

(VDV) Voice Data Video Technician Certified Practice Test

(VDV) Voice Data Video Technician Certified Practice Test

VDV Blueprint Reading & Job Planning