Audio/Video Systems Installation Flashcards
7 cards from real VDV practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Audio/Video Systems Installation flashcards as text
What does the term 'impedance bridging' mean in the context of connecting audio equipment?
Answer: The source impedance is much lower than the load impedance
Impedance bridging means the source (output) impedance is significantly lower than the load (input) impedance, maximizing voltage transfer between devices.
When installing a distributed audio system using a 70V amplifier and speakers, what must be checked before connecting speakers in parallel?
Answer: That the total wattage of all taps does not exceed the amplifier's rated output
In a 70V system, the sum of all speaker tap wattages must not exceed the amplifier's total rated power to prevent overload and distortion.
Which connector type is used to terminate analog component video cables (YPbPr)?
Answer: RCA
Analog component video (YPbPr) uses three RCA connectors, typically color-coded green, blue, and red.
A technician needs to install a video display at a 15-degree tilt on a concrete wall. Which wall mount type should be selected?
Answer: Tilting wall mount
A tilting wall mount allows the display to be angled downward for optimal viewing, which is important when mounting above typical eye level.
What is the primary function of a signal splitter in a video distribution system?
Answer: To distribute one source signal to multiple displays simultaneously
A signal splitter takes one source input and distributes it to multiple outputs so the same content appears on several displays at once.
When pulling cable through conduit for an AV installation, what is the recommended maximum fill ratio to allow for heat dissipation and future cable additions?
Answer: 40%
NEC guidelines recommend a maximum of 40% conduit fill to allow for adequate heat dissipation and ease of pulling additional cables in the future.
A technician is asked to install a conferencing system that includes a ceiling microphone array. What is the primary advantage of this microphone type over a tabletop boundary microphone?
Answer: It captures audio from multiple directions without cluttering the table surface
Ceiling microphone arrays capture speech from multiple participants across the room without occupying table space or requiring participants to position themselves near a mic.