CCTV CCTV System Components 2

Question 1

What is the primary function of a Digital Video Recorder (DVR) in a CCTV system?

Accepted Answer

Convert and store analog camera footage as digital video

Answer

A DVR converts analog video signals from cameras into digital format and stores them on a hard drive for later retrieval.

Question 2

Which connector type is most commonly used to connect coaxial cables to analog CCTV cameras?

Accepted Answer

BNC

Answer

BNC (Bayonet Neill-Concelman) connectors are the industry standard for connecting coaxial cables to analog CCTV cameras and DVRs.

Question 3

A Network Video Recorder (NVR) differs from a DVR primarily because it:

Accepted Answer

Receives pre-encoded digital video streams over a network

Answer

An NVR receives already-encoded digital video from IP cameras over an Ethernet network, whereas a DVR encodes incoming analog signals itself.

Question 4

What does the term 'varifocal lens' mean in the context of CCTV cameras?

Accepted Answer

The focal length can be manually adjusted while maintaining focus

Answer

A varifocal lens allows the operator to manually adjust the focal length (zoom level) and then refocus, providing flexibility for different fields of view.

Question 5

Which type of CCTV housing is rated for outdoor use and protects against weather, dust, and moisture?

Accepted Answer

IP66-rated enclosure

Answer

An IP66-rated enclosure is dust-tight and protected against powerful water jets, making it suitable for outdoor CCTV installations.

CCTV - Closed Circuit Television Practice Test

CCTV - Closed Circuit Television Practice Test

CCTV CCTV System Components 2