CAT Preventive Maintenance Procedures 3

Question 1

When inspecting a duct smoke detector during PM, what physical check is essential before testing?

Accepted Answer

Confirm sampling tubes are clear, properly oriented, and undamaged

Answer

Blocked or misaligned sampling tubes prevent smoke-laden air from reaching the sensing chamber, making the detector non-functional.

Question 2

A technician is testing a pull station and finds the cover glass is cracked. What is the appropriate PM response?

Accepted Answer

Replace the pull station or cover glass before leaving the site

Answer

A cracked cover compromises tamper protection and weatherproofing; the component must be replaced during the same visit.

Question 3

During PM on a burglar alarm system, the technician measures 12.8V on a 12V sealed lead-acid battery at float charge. This indicates:

Accepted Answer

Normal float voltage for a fully charged 12V SLA battery

Answer

A float voltage of approximately 13.5–13.8V is typical at the charger; 12.8V open-circuit indicates a fully charged SLA battery.

Question 4

Which of the following is the correct procedure when temporarily disabling a zone during maintenance to prevent false dispatches?

Accepted Answer

Notify the monitoring station and place the zone on test mode before beginning work

Answer

Notifying the central station and placing the zone on test prevents unnecessary emergency dispatches during maintenance activity.

Question 5

What is the purpose of exercising electromechanical relays during a PM inspection?

Accepted Answer

To prevent contact oxidation and ensure reliable switching

Answer

Cycling relays during PM clears oxidation from contacts that builds up from inactivity, ensuring dependable operation during emergencies.

(CAT) Certified Alarm Technician Level I Practice Test