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 primary purpose of conducting a site survey before designing a CCTV system?
Answer: To identify coverage gaps, lighting conditions, and mounting locations
A site survey identifies physical layout, lighting, obstructions, and ideal camera placement to ensure complete coverage with no blind spots.
Which camera placement strategy is most effective for monitoring a long, narrow corridor?
Answer: Placing a camera at each end of the corridor aimed inward
End-mounted cameras aimed down the length of a corridor capture the full length with maximum depth of field and clear facial images.
What does 'field of view' (FOV) refer to in camera selection for system design?
Answer: The angular extent of the scene captured by the camera lens
Field of view is the angular extent of the observable area captured by a lens, typically measured in degrees horizontally and vertically.
When designing a system for a parking lot, which camera type is most commonly recommended to cover wide areas efficiently?
Answer: Wide-angle or fisheye cameras
Wide-angle or fisheye cameras maximize coverage area per camera, reducing the number of units needed for large open spaces like parking lots.
What is the significance of the 'overlap zone' in a multi-camera CCTV design?
Answer: It indicates areas where two cameras share coverage, eliminating blind spots
Overlap zones ensure that if one camera is obstructed or fails, the adjacent camera still captures activity in that area, preventing coverage gaps.
Which factor most directly affects the minimum illumination requirement when selecting cameras for an outdoor night surveillance design?
Answer: The camera's minimum lux rating
Minimum lux rating determines how little light a camera needs to produce a usable image, which is critical for low-light outdoor nighttime operation.
In CCTV system design, what is 'dead angle' (or blind spot)?
Answer: An area not covered by any camera in the surveillance system
A dead angle is any area within the intended surveillance zone that falls outside the field of view of all installed cameras, leaving it unmonitored.