CST Preventive Maintenance Schedules 3

Question 1

What should a technician check when performing preventive maintenance on a PoE switch that powers IP cameras?

Accepted Answer

Per-port power draw vs. rated PoE budget

Answer

Verifying per-port power consumption against the switch's PoE budget ensures no cameras are being under-powered or causing switch overload.

Question 2

During a PM inspection, a technician notices a camera's image has a persistent blue tint. Which maintenance action should be taken first?

Accepted Answer

Check and recalibrate white balance settings

Answer

A color tint is often a white balance misconfiguration, which can be corrected through camera settings before hardware replacement is considered.

Question 3

How should a maintenance technician document a camera that is functioning but has a partially obstructed field of view due to vegetation growth?

Accepted Answer

Log the obstruction, note required corrective action, and notify the site manager

Answer

Obstructions affecting coverage must be documented with recommended corrective action and communicated to the appropriate stakeholder for resolution.

Question 4

A PM schedule includes testing video analytics such as motion detection. What is the best method to verify motion detection is working correctly?

Accepted Answer

Walk through the detection zone and confirm an alert is triggered

Answer

Physically walking through the detection zone while monitoring the system confirms that motion detection triggers correctly in real-world conditions.

Question 5

Which factor most directly determines how frequently outdoor cameras in harsh environments should receive preventive maintenance?

Accepted Answer

Environmental exposure level such as dust, humidity, and temperature extremes

Answer

Harsh environmental conditions accelerate wear and contamination, requiring more frequent maintenance intervals than cameras in controlled indoor settings.

(CST) Certified Surveillance Technician Practice Test

(CST) Certified Surveillance Technician Practice Test

CST Preventive Maintenance Schedules 3