Video Surveillance System Design Flashcards
7 cards from real CCTV practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Video Surveillance System Design flashcards as text
What is the recommended minimum resolution for a camera intended to capture license plates at a distance of 50 feet?
Answer: 1080p (Full HD) or higher
License plate capture at distance requires high resolution (1080p or higher) to provide enough pixel density for legible plate identification.
When designing a system to minimize storage consumption without sacrificing critical footage, which recording mode is most appropriate?
Answer: Motion-triggered recording
Motion-triggered recording activates only when movement is detected, dramatically reducing storage use while preserving all relevant events.
Which lens focal length provides a narrower field of view and greater magnification for distant subjects?
Answer: 12mm
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.
What is the primary advantage of using a varifocal lens camera in system design?
Answer: It allows the installer to adjust the focal length to match the coverage area
Varifocal lenses can be manually or motorized-adjusted to a range of focal lengths, giving installers flexibility to optimize field of view after mounting.
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?
Answer: 4
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.
What does WDR (Wide Dynamic Range) technology do in a camera, and when is it most needed in system design?
Answer: It balances exposure in scenes with both very bright and very dark areas
WDR technology combines multiple exposures to produce a properly exposed image when a scene contains extreme contrast, such as a bright doorway with a dark interior.
In designing a retail store CCTV system, which area typically requires the highest camera density?
Answer: The point-of-sale (POS) and checkout area
POS and checkout areas are high-theft and fraud zones, requiring close-up coverage of transactions, cash handling, and customer-employee interactions.