CCTV Video Surveillance System Design 3

Question 1

What is the recommended minimum resolution for a camera intended to capture license plates at a distance of 50 feet?

Accepted Answer

1080p (Full HD) or higher

Answer

License plate capture at distance requires high resolution (1080p or higher) to provide enough pixel density for legible plate identification.

Question 2

When designing a system to minimize storage consumption without sacrificing critical footage, which recording mode is most appropriate?

Accepted Answer

Motion-triggered recording

Answer

Motion-triggered recording activates only when movement is detected, dramatically reducing storage use while preserving all relevant events.

Question 3

Which lens focal length provides a narrower field of view and greater magnification for distant subjects?

Accepted Answer

12mm

Answer

Longer focal lengths (12mm) provide greater zoom and magnification but a narrower angle of view, making them ideal for monitoring distant areas or entry points.

Question 4

What is the primary advantage of using a varifocal lens camera in system design?

Accepted Answer

It allows the installer to adjust the focal length to match the coverage area

Answer

Varifocal lenses can be manually or motorized-adjusted to a range of focal lengths, giving installers flexibility to optimize field of view after mounting.

Question 5

A client wants full perimeter coverage of a rectangular warehouse with four corners. What is the minimum number of cameras needed if each has a 90-degree FOV?

Accepted Answer

4

Answer

Four cameras, one at each corner aimed diagonally, each covering 90 degrees can cover all four sides of a rectangular perimeter with no blind spots.

CCTV - Closed Circuit Television Practice Test

CCTV - Closed Circuit Television Practice Test

CCTV Video Surveillance System Design 3