An ever-changing current in a conductor can:
induce a noise voltage in a nearby conductor
create radio frequency interference (RFI)
unbalance the circuit
reduce noise coupling
What is the main function of a graphic or parametric equalizer?
to adjust frequencies with fixed bandwidths
to adjust the bass and treble tones in audio
to balance voice, music, and other audio signals
to boost or cut a specific frequency range
An octave is _____.
an eighth of amplitude
an eighth of a frequency
a doubling of frequency
a doubling of amplitude
When pulling cable in a commercial building, what is a major concern?
The friction coefficient of the cable lubricant
How efficiently the cable can be pulled
Value of cable being installed
Using cable that is approved/rated
Which type of conduit is the best choice for an electronically noisy environment because it offers physical and EMI protection?
Intermediate Metal Conduit (IMC)
Electrical Metallic Tubing (EMT or thinwall)
Flexible Metal Conduit (Flex)
Rigid Metal Conduit (RMC)
Loudspeakers intended for direct coupled wiring have _____.
high impedance
transformers with taps
internal amplifiers
low impedance
How could you secure a Blu-ray player in a rack for stability?
With electrical tape
With a mounting rail
With a custom rack shelf and brackets
It is unnecessary to secure equipment such as a Blu-ray player
Which of the following statements is a true safety practice for mounting loudspeakers?
If you work with a structural engineer, follow their instructions completely
Nails can dependably support overhead loads
You may safely exceed the working load limit without compromising the safety of the installation
Attach heavy loads to a wall or ceiling surface by yourself, without a partner