CAT Knowledge and Skills 2

Question 1

Which wire gauge is most commonly used for connecting alarm system sensors to a control panel over short distances?

Accepted Answer

22 AWG

Answer

22 AWG is the standard wire gauge for low-voltage alarm sensor runs due to its balance of flexibility and conductivity.

Question 2

What is the purpose of an End-of-Line (EOL) resistor in a supervised alarm circuit?

Accepted Answer

To indicate a tamper or cut wire condition to the panel

Answer

An EOL resistor allows the panel to detect opens (cut wires) or shorts by monitoring the circuit's resistance value.

Question 3

A passive infrared (PIR) motion detector primarily detects changes in what physical property?

Accepted Answer

Infrared radiation emitted by moving warm bodies

Answer

PIR sensors detect changes in infrared energy caused by a warm body moving through the sensor's field of view.

Question 4

What NEC article primarily governs the installation of fire alarm systems?

Accepted Answer

Article 760

Answer

NEC Article 760 covers fire alarm systems, including wiring methods and conductor requirements.

Question 5

When testing a heat detector's fixed-temperature rating, which tool is the safest and most recommended method?

Accepted Answer

A listed heat detector test instrument (heat gun)

Answer

Listed heat detector test instruments apply controlled, calibrated heat without risking damage or false alarm misinterpretation.

(CAT) Certified Alarm Technician Practice Test