CVSS CVSS Camera Technology & Optics

Question 1

Which camera sensor type is generally preferred for low-light video surveillance applications?

Accepted Answer

CCD (Charge-Coupled Device)

Answer

CCD sensors typically produce lower noise and better image quality in low-light conditions compared to standard CMOS sensors.

Question 2

What does the term 'depth of field' refer to in surveillance camera optics?

Accepted Answer

The range of distances within which objects appear acceptably sharp

Answer

Depth of field is the zone of acceptable sharpness extending in front of and behind the plane of focus.

Question 3

A varifocal lens on a surveillance camera allows an installer to:

Accepted Answer

Manually adjust the focal length to change the field of view

Answer

A varifocal lens lets the installer manually set the focal length within a range, allowing field-of-view adjustment during installation.

Question 4

What is the primary advantage of a wide dynamic range (WDR) camera in a surveillance system?

Accepted Answer

Ability to capture detail in both bright and dark areas simultaneously

Answer

WDR technology allows a camera to balance exposure so that detail is visible in both bright highlights and dark shadows within the same frame.

Question 5

When selecting a camera lens for license plate capture on a highway lane, which characteristic is most critical?

Accepted Answer

Long focal length for narrow field of view and subject magnification

Answer

A long focal length (telephoto) lens narrows the field of view and magnifies distant subjects, which is essential for capturing legible license plates from a distance.

CVSS - Certified Video Systems Specialist Practice Test

CVSS - Certified Video Systems Specialist Practice Test

CVSS CVSS Camera Technology & Optics