AZ L-71 CCTV & Security Systems Contractor
Exam Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A| Instant
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1. What is the primary purpose of a closed-circuit television (CCTV)
system?
a. To provide internet access
b. To control building temperature
c. To monitor and record visual activity
d. To distribute electrical power
Answer: c. To monitor and record visual activity
Rationale: A CCTV system uses cameras, transmission equipment,
recording devices, and displays to observe and/or record activity
within a defined area. Unlike broadcast television, CCTV is intended
for a limited, controlled distribution of video.
,2. Which component converts an optical image into an electronic
video signal?
a. Video monitor
b. Camera
c. Patch panel
d. Surge protector
Answer: b. Camera
Rationale: The camera contains an image sensor that converts
incoming light into an electrical signal that can be processed,
transmitted, displayed, or recorded. Modern CCTV cameras commonly
use CMOS image sensors.
3. What is the main function of a DVR in a conventional analog CCTV
system?
a. Generate camera illumination
b. Record and manage video from cameras
c. Increase building voltage
d. Detect smoke
Answer: b. Record and manage video from cameras
Rationale: A digital video recorder (DVR) receives video from
compatible cameras, converts or processes the signals as necessary,
,stores recordings, and provides functions such as playback, searching,
and event management.
4. What device is generally used to record video from IP cameras?
a. NVR
b. Transformer
c. Relay coil
d. Analog amplifier
Answer: a. NVR
Rationale: A network video recorder (NVR) is designed to receive and
record digital video streams over a network. IP cameras typically send
encoded video directly through an Ethernet network to the NVR or
another recording platform.
5. What does PoE stand for?
a. Power over Ethernet
b. Protection of Equipment
c. Pulse over Electricity
d. Processing of Ethernet
Answer: a. Power over Ethernet
, Rationale: Power over Ethernet allows compatible network
equipment, such as IP cameras, to receive electrical power through
Ethernet cabling while also carrying data over the same cable.
6. Which Ethernet cable is commonly used for IP camera installations?
a. Category-rated twisted-pair cable
b. Coaxial cable only
c. Thermostat cable
d. Speaker wire
Answer: a. Category-rated twisted-pair cable
Rationale: IP cameras commonly use Category 5e, Category 6, or other
approved twisted-pair Ethernet cabling. The selected cable must meet
the applicable performance and installation requirements.
7. What is the primary purpose of a camera lens?
a. Store video
b. Focus incoming light onto the image sensor
c. Supply PoE power
d. Encrypt video
Answer: b. Focus incoming light onto the image sensor
Rationale: The lens gathers and focuses light onto the camera's image
sensor. Lens characteristics such as focal length, aperture, and field of
Exam Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A| Instant
Download Pdf
1. What is the primary purpose of a closed-circuit television (CCTV)
system?
a. To provide internet access
b. To control building temperature
c. To monitor and record visual activity
d. To distribute electrical power
Answer: c. To monitor and record visual activity
Rationale: A CCTV system uses cameras, transmission equipment,
recording devices, and displays to observe and/or record activity
within a defined area. Unlike broadcast television, CCTV is intended
for a limited, controlled distribution of video.
,2. Which component converts an optical image into an electronic
video signal?
a. Video monitor
b. Camera
c. Patch panel
d. Surge protector
Answer: b. Camera
Rationale: The camera contains an image sensor that converts
incoming light into an electrical signal that can be processed,
transmitted, displayed, or recorded. Modern CCTV cameras commonly
use CMOS image sensors.
3. What is the main function of a DVR in a conventional analog CCTV
system?
a. Generate camera illumination
b. Record and manage video from cameras
c. Increase building voltage
d. Detect smoke
Answer: b. Record and manage video from cameras
Rationale: A digital video recorder (DVR) receives video from
compatible cameras, converts or processes the signals as necessary,
,stores recordings, and provides functions such as playback, searching,
and event management.
4. What device is generally used to record video from IP cameras?
a. NVR
b. Transformer
c. Relay coil
d. Analog amplifier
Answer: a. NVR
Rationale: A network video recorder (NVR) is designed to receive and
record digital video streams over a network. IP cameras typically send
encoded video directly through an Ethernet network to the NVR or
another recording platform.
5. What does PoE stand for?
a. Power over Ethernet
b. Protection of Equipment
c. Pulse over Electricity
d. Processing of Ethernet
Answer: a. Power over Ethernet
, Rationale: Power over Ethernet allows compatible network
equipment, such as IP cameras, to receive electrical power through
Ethernet cabling while also carrying data over the same cable.
6. Which Ethernet cable is commonly used for IP camera installations?
a. Category-rated twisted-pair cable
b. Coaxial cable only
c. Thermostat cable
d. Speaker wire
Answer: a. Category-rated twisted-pair cable
Rationale: IP cameras commonly use Category 5e, Category 6, or other
approved twisted-pair Ethernet cabling. The selected cable must meet
the applicable performance and installation requirements.
7. What is the primary purpose of a camera lens?
a. Store video
b. Focus incoming light onto the image sensor
c. Supply PoE power
d. Encrypt video
Answer: b. Focus incoming light onto the image sensor
Rationale: The lens gathers and focuses light onto the camera's image
sensor. Lens characteristics such as focal length, aperture, and field of
