CPL Security Systems & Electronic Locking Devices 2

Question 1

Which communication protocol is most commonly used by access control panels to communicate with card readers in commercial installations?

Accepted Answer

Wiegand

Answer

Wiegand is the industry-standard protocol for connecting card readers to access control panels, transmitting card data as a series of pulses.

Question 2

An electromagnetic lock (maglock) requires continuous power to remain locked. What is this locking mode called?

Accepted Answer

Fail-safe

Answer

Fail-safe (also called fail-open) means the lock releases when power is lost, allowing free egress during emergencies such as fire alarms.

Question 3

Which type of electric strike is designed to work with mortise locksets and allows the latchbolt to retract without turning the lever?

Accepted Answer

Latch-retracting strike

Answer

A latch-retracting electric strike uses a powered mechanism to retract the latchbolt, enabling egress without mechanical lever actuation.

Question 4

What does REX stand for in the context of access control systems?

Accepted Answer

Request to Exit

Answer

REX (Request to Exit) sensors detect when someone approaches a door from the secure side, shunting the alarm and unlocking the door for egress.

Question 5

A biometric fingerprint reader fails to recognize an enrolled user's finger. What type of error is this?

Accepted Answer

False Reject Rate error

Answer

A False Reject Rate (FRR) error occurs when a legitimate enrolled user is denied access, also called a Type I error in biometrics.

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