CTS AV Site Surveys 3

Question 1

During a site survey, you notice the planned display wall receives direct sunlight from south-facing windows for several hours each afternoon. What is the BEST design response?

Accepted Answer

Specify a high-brightness direct-view LED or LCD panel with anti-reflective coating

Answer

Direct sunlight creates both high ambient light levels and specular reflections. High-brightness displays (2,000–5,000 nits) with anti-reflective glass maintain readable contrast even under direct sunlight, and are the preferred solution when wall relocation is not feasible.

Question 2

What does RT60 measure, and why is it recorded during an AV site survey?

Accepted Answer

The time (in seconds) for sound to decay 60 dB after a source stops — used to assess room acoustics

Answer

RT60 (Reverberation Time) is the time in seconds for a sound to decay 60 dB after the source stops. A high RT60 causes speech intelligibility problems and influences loudspeaker system design, equalization, and acoustic treatment requirements.

Question 3

On a site survey sketch, you mark a symbol indicating an existing wall penetration (sleeve). What critical information should accompany this marking?

Accepted Answer

The sleeve's inner diameter, estimated length through the wall, and fire-rating of the wall assembly

Answer

Sleeve diameter determines cable capacity. Wall fire rating (1-hour, 2-hour) determines whether fire-stop compound must be re-applied after cabling, which affects scheduling and compliance with local codes.

Question 4

A site survey identifies that the planned rack room has no dedicated air conditioning and relies on building HVAC only. Equipment in the rack dissipates 4,200 BTU/hr total. What action should the AV designer take?

Accepted Answer

Document the heat load and recommend a dedicated rack-cooling solution or room air conditioner to the client

Answer

Building HVAC is designed for human comfort, not equipment heat loads. 4,200 BTU/hr is significant and will cause elevated ambient temperatures, reducing equipment reliability and lifespan. The designer must communicate this risk and recommend a solution.

Question 5

When measuring a room for display sizing per AVIXA DISCAS standards, what is the formula for calculating the maximum viewing distance for a display?

Accepted Answer

Maximum distance = display height × 8

Answer

AVIXA's DISCAS (Display Image Size for 2D Content in Audiovisual Systems) standard specifies maximum viewing distance = 8 × display height for general AV content, ensuring adequate image resolution for the furthest viewer.

(CTS) Certified Technology Specialist Practice Test

(CTS) Certified Technology Specialist Practice Test

CTS AV Site Surveys 3