CCTV Operator 5

Question 1

What is the purpose of a CCTV system's 'watermarking' feature?

Accepted Answer

To embed hidden data into video to verify authenticity and detect tampering

Answer

Digital watermarking embeds invisible metadata into video footage, allowing investigators to verify that the footage has not been altered or tampered with.

Question 2

An operator using a DVR-based system notices the 'HDD full' warning. What is the correct immediate action?

Accepted Answer

Report the warning to the supervisor and follow the organization's retention and overwrite policy

Answer

A full HDD warning must be escalated to a supervisor so the organization's data retention policy is followed before any footage is overwritten or deleted.

Question 3

What does 'frame rate' mean in the context of CCTV recording, and why does it matter?

Accepted Answer

The number of images captured per second, which affects how smoothly motion is reproduced in playback

Answer

Frame rate determines how many images are recorded per second; higher rates produce smoother video with less motion blur, which is important for identifying fast-moving subjects.

Question 4

A CCTV operator receives a request from a member of the public to view footage of themselves. Under US privacy principles, what should the operator do?

Accepted Answer

Direct the person to submit a formal data subject access request through the appropriate channel

Answer

Individuals may have rights to access footage of themselves, but this must be handled through formal procedures to protect the privacy of others who may appear in the same footage.

Question 5

In CCTV surveillance, what is 'signal-to-noise ratio' (SNR) most directly related to?

Accepted Answer

The clarity of a camera's image, particularly in low-light conditions

Answer

A higher SNR means the camera sensor captures more useful image data relative to electronic noise, resulting in a cleaner image especially in low-light environments.

CCTV - Closed Circuit Television Practice Test

CCTV - Closed Circuit Television Practice Test

CCTV Operator 5