CCTV CCTV System Components 3

Question 1

What is the role of a video management system (VMS) in a large-scale IP CCTV installation?

Accepted Answer

Centrally manage, record, and retrieve video from multiple IP cameras and NVRs

Answer

A VMS is software that centralizes the control, recording, playback, and management of video from dozens or thousands of IP cameras across a network.

Question 2

Which camera component determines how much light is needed to produce a usable image?

Accepted Answer

The image sensor sensitivity (measured in lux)

Answer

The image sensor's minimum illumination rating (in lux) indicates how little light is needed to capture a usable image — lower lux values mean better low-light performance.

Question 3

A CCTV system uses a 'quad processor.' What does this device do?

Accepted Answer

Splits a monitor screen into four quadrants to display four cameras simultaneously

Answer

A quad processor divides a single monitor screen into four equal quadrants so that four camera feeds can be viewed simultaneously in real time.

Question 4

What is the primary advantage of using fiber optic cable to transmit CCTV video signals?

Accepted Answer

Immunity to electromagnetic interference and ability to span very long distances

Answer

Fiber optic cable transmits light instead of electrical signals, making it immune to EMI/RFI and capable of carrying video over distances exceeding several kilometers without signal degradation.

Question 5

In CCTV terminology, what does 'WDR' (Wide Dynamic Range) refer to?

Accepted Answer

A camera's ability to capture detail in both very bright and very dark areas simultaneously

Answer

WDR technology allows a camera to simultaneously expose for both bright and dark areas of a scene, preventing overexposed highlights and underexposed shadows.

CCTV - Closed Circuit Television Practice Test

CCTV - Closed Circuit Television Practice Test

CCTV CCTV System Components 3