South Carolina Audio Visual Systems
Technician Certification License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following is the most important first step when
beginning the installation of an audiovisual system?
A. Adjusting the audio levels
B. Reviewing the system design and schematic
C. Powering on all devices
D. Running a system diagnostic
Rationale: The initial step must always be to review the system
design and schematic so the installer fully understands requirements
and layout before any physical work begins.
2. What is the primary purpose of a crossover network in an audio
system?
A. To increase amplifier power
B. To divide the audio signal into separate frequency bands
C. To convert analog to digital signals
D. To boost subwoofer output
Rationale: A crossover network splits the audio signal into distinct
frequency ranges so each speaker receives only the frequencies it is
designed to reproduce.
,3. When terminating an XLR cable, the shield conductor should be
connected to which pin on the connector?
A. Pin 1
B. Pin 1
C. Pin 2
D. Pin 3
Rationale: In standard XLR wiring, pin 1 is reserved for the shield or
ground conductor to ensure proper noise rejection.
4. What does HDCP stand for in video systems?
A. High Definition Component Protocol
B. High Data Content Protection
C. High-bandwidth Digital Content Protection
D. High Definition Content Protocol
Rationale: HDCP stands for High-bandwidth Digital Content
Protection, a security standard used to prevent unauthorized copying
over digital connections.
5. A projector’s throw ratio is defined as:
A. Lumens per watt
B. Distance from lens to screen divided by image width
C. Aspect ratio of the image
D. Screen height divided by image width
Rationale: Throw ratio determines how far a projector must be
placed from the screen to achieve a given image width.
6. In balanced audio cabling, the audio signal is carried on:
A. One conductor and shield
B. Two conductors and shield
C. Two conductors only
D. Four conductors in twisted pairs
, Rationale: Balanced cables use two signal conductors plus a shield to
reject noise and interference.
7. What is the typical impedance of professional audio line-level outputs?
A. 10 ohms
B. 50 ohms
C. 600 ohms
D. 10,000 ohms
Rationale: Standard professional line-level outputs are around 600
ohms to maintain consistent signal transfer between devices.
8. A DA (distribution amplifier) is used to:
A. Boost audio frequency
B. Convert analog signals to digital
C. Split a signal without loss of quality
D. Increase video resolution
Rationale: A distribution amplifier takes one source input and
provides multiple outputs at the same quality level.
9. What does ANSI lumens measure?
A. Brightness of a display screen
B. Brightness output of a projector
C. Electrical power consumption
D. Contrast ratio
Rationale: ANSI lumens quantify the visible brightness output of a
projector in controlled measurement conditions.
10. Which connector type is commonly used for HD video and audio
on consumer devices?
A. VGA
B. DVI
C. HDMI
D. RCA
Technician Certification License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following is the most important first step when
beginning the installation of an audiovisual system?
A. Adjusting the audio levels
B. Reviewing the system design and schematic
C. Powering on all devices
D. Running a system diagnostic
Rationale: The initial step must always be to review the system
design and schematic so the installer fully understands requirements
and layout before any physical work begins.
2. What is the primary purpose of a crossover network in an audio
system?
A. To increase amplifier power
B. To divide the audio signal into separate frequency bands
C. To convert analog to digital signals
D. To boost subwoofer output
Rationale: A crossover network splits the audio signal into distinct
frequency ranges so each speaker receives only the frequencies it is
designed to reproduce.
,3. When terminating an XLR cable, the shield conductor should be
connected to which pin on the connector?
A. Pin 1
B. Pin 1
C. Pin 2
D. Pin 3
Rationale: In standard XLR wiring, pin 1 is reserved for the shield or
ground conductor to ensure proper noise rejection.
4. What does HDCP stand for in video systems?
A. High Definition Component Protocol
B. High Data Content Protection
C. High-bandwidth Digital Content Protection
D. High Definition Content Protocol
Rationale: HDCP stands for High-bandwidth Digital Content
Protection, a security standard used to prevent unauthorized copying
over digital connections.
5. A projector’s throw ratio is defined as:
A. Lumens per watt
B. Distance from lens to screen divided by image width
C. Aspect ratio of the image
D. Screen height divided by image width
Rationale: Throw ratio determines how far a projector must be
placed from the screen to achieve a given image width.
6. In balanced audio cabling, the audio signal is carried on:
A. One conductor and shield
B. Two conductors and shield
C. Two conductors only
D. Four conductors in twisted pairs
, Rationale: Balanced cables use two signal conductors plus a shield to
reject noise and interference.
7. What is the typical impedance of professional audio line-level outputs?
A. 10 ohms
B. 50 ohms
C. 600 ohms
D. 10,000 ohms
Rationale: Standard professional line-level outputs are around 600
ohms to maintain consistent signal transfer between devices.
8. A DA (distribution amplifier) is used to:
A. Boost audio frequency
B. Convert analog signals to digital
C. Split a signal without loss of quality
D. Increase video resolution
Rationale: A distribution amplifier takes one source input and
provides multiple outputs at the same quality level.
9. What does ANSI lumens measure?
A. Brightness of a display screen
B. Brightness output of a projector
C. Electrical power consumption
D. Contrast ratio
Rationale: ANSI lumens quantify the visible brightness output of a
projector in controlled measurement conditions.
10. Which connector type is commonly used for HD video and audio
on consumer devices?
A. VGA
B. DVI
C. HDMI
D. RCA
