CO CCTV Installer Contractor Exam
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant
Download Pdf.
1. Which design consideration is most important when selecting a
CCTV camera for a location where the primary objective is reliable
identification of a person's face at a controlled entrance?
A. Maximum audio pickup range
B. Adequate pixel density across the identification area
C. Lowest possible camera resolution
D. Highest available frame rate regardless of lighting
Rationale: Adequate pixel density ensures that sufficient image detail is
captured within the area of interest to distinguish facial characteristics.
Resolution alone does not guarantee identification if the camera is
positioned too far away or the scene is too wide.
2. In a CCTV system, what is the primary function of a lens with a
shorter focal length?
A. Narrowing the field of view
B. Increasing optical magnification
,C. Providing a wider field of view
D. Eliminating all perspective distortion
Rationale: A shorter focal length generally produces a wider field of
view, making such lenses useful when a camera must cover a broad
area. Longer focal lengths provide narrower views and greater apparent
magnification.
3. A CCTV installer is determining the horizontal field of view for a
fixed camera. Which combination most directly affects the field of
view?
A. Cable jacket color and connector type
B. Sensor size and lens focal length
C. Recording duration and hard-drive capacity
D. Network password and switch manufacturer
Rationale: Field of view is primarily determined by the camera sensor
dimensions and lens focal length. A larger sensor or shorter focal length
generally produces a wider field of view.
4. What is the principal advantage of using an IP camera instead of a
traditional analog camera in a modern networked surveillance
system?
A. It does not require electrical power
B. It cannot be accessed remotely
C. It can transmit digital video directly over an IP network
D. It eliminates the need for any recording equipment
,Rationale: IP cameras convert captured video into digital data that can
be transmitted across Ethernet networks. They can integrate with
network video recorders, switches, storage systems, and remote-access
platforms.
5. What does Power over Ethernet (PoE) allow an appropriately
equipped CCTV installation to accomplish?
A. Carry video only over coaxial cable
B. Carry electrical power and network data over compatible Ethernet
cabling
C. Eliminate the need for network addressing
D. Increase the optical resolution of the camera
Rationale: PoE allows compatible Ethernet infrastructure to deliver
power and data over the same twisted-pair cable. This can simplify
installation by reducing the need for separate power wiring at each
camera.
6. Which IEEE standard is commonly associated with basic PoE delivery
over Ethernet?
A. IEEE 802.11ax
B. IEEE 802.3ad
C. IEEE 802.3af
D. IEEE 802.1Q
, Rationale: IEEE 802.3af defines the original commonly deployed PoE
standard, providing power over Ethernet to compatible powered
devices. Other PoE standards provide higher power levels.
7. What is the principal purpose of an NVR in an IP-based CCTV
system?
A. Convert AC power into optical light
B. Adjust the physical aperture of every lens
C. Record and manage video received from network cameras
D. Replace all network switches
Rationale: A Network Video Recorder receives video streams from IP
cameras and provides functions such as recording, playback, storage
management, and often search and monitoring capabilities.
8. What is the principal difference between a DVR and an NVR?
A. A DVR cannot store video
B. An NVR can only operate with analog cameras
C. A DVR generally processes video from directly connected analog
cameras, while an NVR records networked video streams
D. A DVR does not require electricity
Rationale: DVR systems traditionally receive analog video over coaxial
connections and perform digitization and recording, whereas NVR
systems typically receive already digitized video over an IP network.
9. Why is camera placement especially important when surveillance
footage may be used to identify individuals?
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant
Download Pdf.
1. Which design consideration is most important when selecting a
CCTV camera for a location where the primary objective is reliable
identification of a person's face at a controlled entrance?
A. Maximum audio pickup range
B. Adequate pixel density across the identification area
C. Lowest possible camera resolution
D. Highest available frame rate regardless of lighting
Rationale: Adequate pixel density ensures that sufficient image detail is
captured within the area of interest to distinguish facial characteristics.
Resolution alone does not guarantee identification if the camera is
positioned too far away or the scene is too wide.
2. In a CCTV system, what is the primary function of a lens with a
shorter focal length?
A. Narrowing the field of view
B. Increasing optical magnification
,C. Providing a wider field of view
D. Eliminating all perspective distortion
Rationale: A shorter focal length generally produces a wider field of
view, making such lenses useful when a camera must cover a broad
area. Longer focal lengths provide narrower views and greater apparent
magnification.
3. A CCTV installer is determining the horizontal field of view for a
fixed camera. Which combination most directly affects the field of
view?
A. Cable jacket color and connector type
B. Sensor size and lens focal length
C. Recording duration and hard-drive capacity
D. Network password and switch manufacturer
Rationale: Field of view is primarily determined by the camera sensor
dimensions and lens focal length. A larger sensor or shorter focal length
generally produces a wider field of view.
4. What is the principal advantage of using an IP camera instead of a
traditional analog camera in a modern networked surveillance
system?
A. It does not require electrical power
B. It cannot be accessed remotely
C. It can transmit digital video directly over an IP network
D. It eliminates the need for any recording equipment
,Rationale: IP cameras convert captured video into digital data that can
be transmitted across Ethernet networks. They can integrate with
network video recorders, switches, storage systems, and remote-access
platforms.
5. What does Power over Ethernet (PoE) allow an appropriately
equipped CCTV installation to accomplish?
A. Carry video only over coaxial cable
B. Carry electrical power and network data over compatible Ethernet
cabling
C. Eliminate the need for network addressing
D. Increase the optical resolution of the camera
Rationale: PoE allows compatible Ethernet infrastructure to deliver
power and data over the same twisted-pair cable. This can simplify
installation by reducing the need for separate power wiring at each
camera.
6. Which IEEE standard is commonly associated with basic PoE delivery
over Ethernet?
A. IEEE 802.11ax
B. IEEE 802.3ad
C. IEEE 802.3af
D. IEEE 802.1Q
, Rationale: IEEE 802.3af defines the original commonly deployed PoE
standard, providing power over Ethernet to compatible powered
devices. Other PoE standards provide higher power levels.
7. What is the principal purpose of an NVR in an IP-based CCTV
system?
A. Convert AC power into optical light
B. Adjust the physical aperture of every lens
C. Record and manage video received from network cameras
D. Replace all network switches
Rationale: A Network Video Recorder receives video streams from IP
cameras and provides functions such as recording, playback, storage
management, and often search and monitoring capabilities.
8. What is the principal difference between a DVR and an NVR?
A. A DVR cannot store video
B. An NVR can only operate with analog cameras
C. A DVR generally processes video from directly connected analog
cameras, while an NVR records networked video streams
D. A DVR does not require electricity
Rationale: DVR systems traditionally receive analog video over coaxial
connections and perform digitization and recording, whereas NVR
systems typically receive already digitized video over an IP network.
9. Why is camera placement especially important when surveillance
footage may be used to identify individuals?
