CST Intrusion Detection & Monitoring 3

Question 1

A seismic sensor installed on a safe would primarily detect which type of intrusion attempt?

Accepted Answer

Vibrations caused by drilling or cutting on the protected object

Answer

Seismic sensors are tuned to detect low-frequency vibrations transmitted through solid objects, making them ideal for detecting physical attacks such as drilling or grinding on safes or vaults.

Question 2

In a monitored alarm system, what is the standard communication path used as a primary channel under UL 2050 requirements?

Accepted Answer

Digital communicator over PSTN

Answer

UL 2050 traditionally recognizes the digital communicator over the Public Switched Telephone Network (PSTN) as the primary communication path, though IP and cellular are now widely used as supplements or replacements.

Question 3

What is the function of an alarm control panel's 'event log' or 'history buffer'?

Accepted Answer

To record a time-stamped sequence of system events for review and audit

Answer

The event log maintains a time-stamped record of alarms, arm/disarm actions, faults, and user activity, which is critical for post-incident investigation and system auditing.

Question 4

Which wiring configuration is required to ensure a contact device reports both an alarm condition AND a tamper condition on a single two-wire circuit?

Accepted Answer

Double-balanced circuit with two resistors

Answer

A double-balanced circuit uses two resistors—one in series and one in parallel—to create three distinct resistance states: normal, alarm, and tamper/short.

Question 5

A customer reports that their outdoor microwave motion detector triggers frequently when no one is present. Which environmental factor is most likely responsible?

Accepted Answer

Vegetation movement caused by wind

Answer

Microwave sensors detect motion by measuring Doppler shift in reflected RF energy; moving vegetation such as tree branches or tall grass falls within their detection pattern and causes false alarms.

(CST) Certified Surveillance Technician Practice Test

(CST) Certified Surveillance Technician Practice Test

CST Intrusion Detection & Monitoring 3