Security Systems & Electronic Access Flashcards

Which wire gauge consideration most affects voltage drop to an electric lock at a long cable run?

Answer: Using a thicker wire gauge (lower AWG number)

Thicker wire has lower resistance and so reduces voltage drop over long runs.

On a basic burglar alarm zone, a normally closed (NC) loop triggers an alarm when:

Answer: The circuit is opened or cut

NC loops alarm when the circuit opens, which also catches wire cuts.

What is an end-of-line (EOL) resistor used for in an alarm zone?

Answer: Supervising the loop to detect shorts and opens

EOL resistors let the panel tell normal, alarm, open and short conditions apart.

Which sensor type is best for detecting a glass-break event?

Answer: Acoustic glass-break detector

Acoustic detectors listen for the frequency signature of breaking glass.

A common cause of PIR motion detector false alarms is:

Answer: Pets or heat sources and air currents in the coverage area

PIRs sense heat changes, so pets, heaters and drafts can cause false alarms.

For a locksmith installing a keypad lock, which practice best protects against an installer-default code being exploited?

Answer: Changing the default master/programming code at installation

Factory default codes are publicly documented, so they must be changed at install.

What does a 'lockout' feature on a keypad do after several incorrect code entries?

Answer: Temporarily disables entry attempts to resist guessing attacks

Lockout temporarily blocks input after repeated wrong entries to slow brute-force attempts.