CTS - Certified Technology Specialist Conducting AV Site Surveys Questions and Answers 1 — Questions and Answers
Question 1: During a site survey for a video conferencing system installation in a boardroom with large exterior windows, which of the following is the MOST critical environmental factor to measure and document?
- Reverberation Time (RT60)
- Ambient light levels at different times of the day (Correct answer)
- HVAC noise levels in dBA
- Available network bandwidth
Correct answer: Ambient light levels at different times of the day
While all listed factors are important for a successful AV installation, ambient light is the most critical for a video conferencing system, especially in a room with significant natural light. Excessive or changing light levels can cause issues with camera exposure, create glare on displays, and wash out images, severely impacting the video quality for far-end participants. Documenting these levels at various times ensures the correct display brightness, camera specifications, and need for light control (like blackout shades) are determined.
Question 2: An AV technician is surveying a multi-purpose event space to design a new sound reinforcement system. The client reports that speech intelligibility is poor, especially when the room is full. Which acoustic measurement is most important to take to diagnose this issue?
- Sound Pressure Level (SPL)
- Frequency Response
- Signal-to-Noise Ratio (SNR)
- Reverberation Time (RT60) (Correct answer)
Correct answer: Reverberation Time (RT60)
Reverberation Time (RT60) measures how long it takes for sound to decay in a space. A long RT60 time indicates that sound is reflecting off hard surfaces for an extended period, causing echoes and muddiness that severely degrade speech intelligibility. By measuring the RT60, the technician can quantify the reverberation issue and recommend appropriate acoustic treatment, such as absorption panels, to solve the client's problem.
Question 3: When conducting a site survey, which of the following is NOT typically considered part of the initial structural and infrastructure assessment?
- Location and amperage of electrical outlets
- Type of wall construction (drywall, concrete, etc.)
- End-user software preferences (Correct answer)
- Potential pathways for cable runs above the ceiling
Correct answer: End-user software preferences
The initial structural and infrastructure assessment focuses on the physical characteristics of the site that will support the AV system. This includes power availability, structural integrity for mounting equipment, and pathways for cabling. End-user software preferences are gathered during the needs analysis or programming phase, which is a separate, though equally important, part of the overall project discovery process.
Question 4: A client wants to install a large direct-view LED video wall in their corporate lobby. During the site survey, what is a critical consideration regarding the intended mounting surface?
- The color of the wall paint
- The distance to the nearest network port
- The structural capacity of the wall to support the total weight (Correct answer)
- The location of the nearest fire alarm pull station
Correct answer: The structural capacity of the wall to support the total weight
Direct-view LED video walls are very heavy, and their weight must be supported by the building structure. During the site survey, it is essential to verify that the wall designated for the installation has adequate structural support to handle the combined weight of the display, the mount, and any associated components. This often requires consultation with a structural engineer. The other factors are important for the overall project but are secondary to the fundamental safety and feasibility concern of structural integrity.
Question 5: Which of the following should be included in a comprehensive site survey report to ensure a smooth installation process?
- A list of preferred equipment manufacturers
- The client's budget for the project
- Detailed photographs of the site, including potential obstructions (Correct answer)
- The project's final programming code
Correct answer: Detailed photographs of the site, including potential obstructions
A thorough site survey report should include detailed documentation of the existing conditions. Photographs are invaluable as they provide a clear, objective record of the space, including dimensions, existing infrastructure, and any potential obstructions like columns, HVAC ducts, or sprinkler heads that could interfere with the installation. As the saying goes, "a picture is worth a thousand words" and helps the entire project team, from design to installation, understand the environment without having to guess.
Question 6: During an AV site survey for a new system, the technician identifies the location of all required power outlets but neglects to check the electrical panel. What is the primary risk of this oversight?
- The display might not be bright enough.
- The warranty on the equipment could be voided.
- The existing circuits may not have sufficient capacity for the new AV equipment load. (Correct answer)
- The audio system may experience ground loop hum.
Correct answer: The existing circuits may not have sufficient capacity for the new AV equipment load.
Simply locating outlets is insufficient; a proper survey involves assessing the electrical system's capacity. The technician must verify that the circuits powering the outlets can handle the additional load of the new AV system. By checking the electrical panel, the technician can identify the amperage of the circuits and determine if they are dedicated or shared with other high-draw equipment. Overloading a circuit can lead to tripped breakers and system failure.
CTS - Certified Technology Specialist Conducting AV Site Surveys Questions and Answers 1
During a site survey for a video conferencing system installation in a boardroom with large exterior windows, which of the following is the MOST critical environmental factor to measure and document?