VDV Audio/Video Systems Installation 2

Question 1

When installing ceiling speakers in a commercial space, what is the recommended minimum distance from a speaker to a wall to avoid comb filtering?

Accepted Answer

4 feet

Answer

Placing ceiling speakers at least 4 feet from walls minimizes comb filtering caused by early reflections interfering with direct sound.

Question 2

Which cable type is most appropriate for running a balanced audio signal over 100 feet to minimize noise pickup?

Accepted Answer

Shielded twisted pair (STP) with XLR connectors

Answer

Shielded twisted pair with XLR connectors carries balanced audio signals, which reject common-mode noise over long cable runs.

Question 3

A projector is displaying a washed-out image in a room with high ambient light. Which specification should be increased when selecting a replacement projector?

Accepted Answer

ANSI lumens output

Answer

Higher ANSI lumens output overcomes ambient light interference, producing a brighter and more visible projected image.

Question 4

What is the purpose of a rack-mount UPS (Uninterruptible Power Supply) in an AV equipment rack?

Accepted Answer

To provide clean power and protect equipment during outages

Answer

A rack-mount UPS conditions incoming power and provides battery backup to prevent equipment damage and data loss during power interruptions.

Question 5

When terminating an RJ-45 connector for a VoIP phone installation, which wiring standard is most commonly used in the United States?

Accepted Answer

Either T568A or T568B, but consistently throughout the installation

Answer

Both T568A and T568B are acceptable, but the same standard must be used consistently on both ends of every cable in the installation.

(VDV) Voice Data Video Technician Certified Practice Test

(VDV) Voice Data Video Technician Certified Practice Test

VDV Audio/Video Systems Installation 2