CTS Conducting AV Site Surveys 2 — Questions and Answers
Question 1: What is the primary reason for documenting ceiling height during an AV site survey?
- To calculate room volume for HVAC load capacity
- To determine projector throw distance and display mounting options (Correct answer)
- To estimate material and painting costs
- To measure natural lighting levels
Correct answer: To determine projector throw distance and display mounting options
Ceiling height directly governs projector placement, throw distance, and feasible mounting heights for displays and screens.
Question 2: You discover during a survey that the planned AV room has only two 20-amp circuits for a large system. What is the correct course of action?
- Use power strips to distribute the load across both circuits
- Reduce AV equipment count to fit within available power
- Document the deficiency and coordinate with the electrical contractor for additional circuits (Correct answer)
- Proceed with installation and address power shortfalls after commissioning
Correct answer: Document the deficiency and coordinate with the electrical contractor for additional circuits
Power deficiencies must be documented and resolved through the electrical contractor before AV installation begins.
Question 3: Which environmental factor most significantly increases projector lumen requirements in a space?
- High ambient light from windows and overhead fixtures (Correct answer)
- Elevated room temperature above 85°F
- Long cable runs from the source to the projector
- High reverberation time in the room
Correct answer: High ambient light from windows and overhead fixtures
Ambient light competes directly with the projected image, requiring higher lumen output to maintain adequate contrast ratio.
Question 4: What is the primary HVAC concern when selecting a location for AV equipment racks during a site survey?
- Placing racks near heating vents to prevent equipment from getting too cold
- Locating racks below overhead windows for natural ventilation
- Positioning racks under air returns to maximize airflow direction
- Ensuring adequate cooling airflow while protecting equipment from dusty air return paths (Correct answer)
Correct answer: Ensuring adequate cooling airflow while protecting equipment from dusty air return paths
Equipment racks generate significant heat and require clean, cool airflow while being positioned away from dusty air return paths.
Question 5: During a survey, you find the facility operates on 208V single-phase power. What AV planning step is required?
- No adjustment needed since 208V is standard for all professional AV equipment
- Verify AV equipment voltage compatibility and plan for step-down transformers if needed (Correct answer)
- Specify only battery-powered AV equipment throughout the space
- Request the facility upgrade to 120V service before the AV installation begins
Correct answer: Verify AV equipment voltage compatibility and plan for step-down transformers if needed
Many AV devices are rated for 120V, so a 208V supply requires compatibility verification and potential transformer use.
Question 6: Why is documenting VLAN configuration important during an AV site survey?
- To determine how many wireless devices can connect to the network simultaneously
- To assess cybersecurity vulnerabilities in the existing building network
- To properly segment AV control traffic and avoid conflicts with other network services (Correct answer)
- To measure network latency for video streaming quality assessments
Correct answer: To properly segment AV control traffic and avoid conflicts with other network services
AV control systems and networked AV devices often require dedicated VLANs to ensure reliable operation and avoid IP address conflicts.
Question 7: Which tool is most appropriate for verifying that a concrete floor is level before installing equipment racks?
- A spirit level or digital inclinometer (Correct answer)
- A laser distance meter
- A sound level meter
- A clamp meter
Correct answer: A spirit level or digital inclinometer
A spirit level or digital inclinometer accurately measures floor levelness, which is critical for stable and plumb rack installation.
CTS Conducting AV Site Surveys 2
What is the primary reason for documenting ceiling height during an AV site survey?