CO CCTV Installer Contractor 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 public broadcast television
B. To distribute internet service throughout a building
C. To monitor and record video from designated areas
D. To control building heating equipment
Rationale: A CCTV system is designed to capture, transmit, display,
and often record video from cameras installed at specific locations.
Unlike broadcast television, CCTV is intended for controlled viewing by
authorized users.
, 2. Which component converts an optical image into an electronic
video signal?
A. Video monitor
B. Network switch
C. Digital video recorder
D. Camera image sensor
Rationale: The image sensor inside a camera converts incoming light
into an electronic signal. Modern CCTV cameras commonly use CMOS
sensors, although other sensor technologies may also be encountered.
3. What is the main function of a DVR in a traditional analog CCTV
system?
A. Supply power to cameras
B. Record and manage video from cameras
C. Increase the camera lens focal length
D. Convert AC power to telephone signals
Rationale: A digital video recorder (DVR) receives video from
compatible cameras, digitizes and compresses the video when
necessary, and stores it on hard drives or other storage media. It can
also provide playback and monitoring functions.
4. What is the primary function of an NVR?
,A. Generate camera illumination
B. Convert fiber optic signals into radio signals
C. Record and manage video from network cameras
D. Regulate building voltage
Rationale: A network video recorder (NVR) is designed primarily for
IP-based surveillance systems. Network cameras transmit digital video
over an Ethernet/IP network to the NVR for recording and
management.
5. Which transmission medium is commonly used to connect IP
CCTV cameras to an Ethernet network?
A. Coaxial cable only
B. RG-59 television cable only
C. Category-rated twisted-pair cable
D. Speaker wire
Rationale: IP cameras commonly use twisted-pair Ethernet cabling
such as Category 5e or Category 6. Proper cable selection and
installation help maintain reliable network communication.
6. What does PoE stand for?
A. Power over Equipment
B. Power over Ethernet
, C. Protection of Electronics
D. Programming over Equipment
Rationale: Power over Ethernet allows compatible network devices,
such as many IP cameras, to receive electrical power through Ethernet
cabling. This can eliminate the need for a separate power cable at the
camera.
7. Which device commonly provides PoE connections to multiple IP
cameras?
A. Video monitor
B. DVR without network capability
C. PoE network switch
D. Camera lens
Rationale: A PoE switch can provide both Ethernet data connectivity
and electrical power to compatible devices. The switch is connected to
the network and distributes connections to multiple cameras.
8. What is the purpose of a camera's lens?
A. Store recorded video
B. Supply network power
C. Focus and direct light onto the image sensor
D. Encrypt recorded footage
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 public broadcast television
B. To distribute internet service throughout a building
C. To monitor and record video from designated areas
D. To control building heating equipment
Rationale: A CCTV system is designed to capture, transmit, display,
and often record video from cameras installed at specific locations.
Unlike broadcast television, CCTV is intended for controlled viewing by
authorized users.
, 2. Which component converts an optical image into an electronic
video signal?
A. Video monitor
B. Network switch
C. Digital video recorder
D. Camera image sensor
Rationale: The image sensor inside a camera converts incoming light
into an electronic signal. Modern CCTV cameras commonly use CMOS
sensors, although other sensor technologies may also be encountered.
3. What is the main function of a DVR in a traditional analog CCTV
system?
A. Supply power to cameras
B. Record and manage video from cameras
C. Increase the camera lens focal length
D. Convert AC power to telephone signals
Rationale: A digital video recorder (DVR) receives video from
compatible cameras, digitizes and compresses the video when
necessary, and stores it on hard drives or other storage media. It can
also provide playback and monitoring functions.
4. What is the primary function of an NVR?
,A. Generate camera illumination
B. Convert fiber optic signals into radio signals
C. Record and manage video from network cameras
D. Regulate building voltage
Rationale: A network video recorder (NVR) is designed primarily for
IP-based surveillance systems. Network cameras transmit digital video
over an Ethernet/IP network to the NVR for recording and
management.
5. Which transmission medium is commonly used to connect IP
CCTV cameras to an Ethernet network?
A. Coaxial cable only
B. RG-59 television cable only
C. Category-rated twisted-pair cable
D. Speaker wire
Rationale: IP cameras commonly use twisted-pair Ethernet cabling
such as Category 5e or Category 6. Proper cable selection and
installation help maintain reliable network communication.
6. What does PoE stand for?
A. Power over Equipment
B. Power over Ethernet
, C. Protection of Electronics
D. Programming over Equipment
Rationale: Power over Ethernet allows compatible network devices,
such as many IP cameras, to receive electrical power through Ethernet
cabling. This can eliminate the need for a separate power cable at the
camera.
7. Which device commonly provides PoE connections to multiple IP
cameras?
A. Video monitor
B. DVR without network capability
C. PoE network switch
D. Camera lens
Rationale: A PoE switch can provide both Ethernet data connectivity
and electrical power to compatible devices. The switch is connected to
the network and distributes connections to multiple cameras.
8. What is the purpose of a camera's lens?
A. Store recorded video
B. Supply network power
C. Focus and direct light onto the image sensor
D. Encrypt recorded footage
