Practice Test Geeks(CSI) Certified Security Investigator Practice Test
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Electronic Surveillance Systems Flashcards

7 cards from real CSI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Electronic Surveillance Systems flashcards as text

  1. Which camera technology provides the best image quality in near-total darkness without emitting visible light?

    Answer: Thermal infrared cameras

    Thermal infrared cameras detect heat signatures rather than visible light, providing imaging in complete darkness without any illumination.

  2. In CCTV surveillance, what does 'dwell time' refer to?

    Answer: The time a PTZ camera remains on a preset position before cycling

    Dwell time is the duration a pan-tilt-zoom camera pauses at each preset position during an auto-patrol sequence before moving to the next.

  3. An investigator notices a surveillance camera with a very narrow field of view but extreme detail at long range. This is most likely equipped with a:

    Answer: Telephoto lens

    Telephoto lenses have long focal lengths that magnify distant subjects while narrowing the field of view, ideal for long-range detail capture.

  4. What is the primary legal concern when conducting covert video surveillance in a workplace?

    Answer: Employee expectation of privacy in certain areas

    Employees retain an expectation of privacy in areas such as restrooms and locker rooms, and covert surveillance in these areas is illegal regardless of employer authorization.

  5. Which type of transmission is most susceptible to interception when used in a wireless surveillance system?

    Answer: Unencrypted 2.4 GHz RF

    Unencrypted 2.4 GHz RF transmissions can be intercepted with readily available equipment, making them the least secure transmission method listed.

  6. A digital video recorder (DVR) uses H.264 compression. Compared to older MPEG-2, what is the main advantage?

    Answer: Smaller file sizes at equivalent image quality

    H.264 achieves significantly smaller file sizes than MPEG-2 at the same image quality level, allowing longer storage retention or less storage space.

  7. When establishing a surveillance post, the term 'backstop' refers to:

    Answer: The background behind a subject that identifies their location

    A backstop is the background visible behind a surveillance subject, used to confirm location and provide context for identification in recorded footage.