Select the statement(s) that are TRUE regarding 'Building Security Services'.
Show Hint
- 'Radio Frequency Identification Device' is used for electronic access control system.
- 'Magnetic Loop Detector' is used for fire detection system.
- 'Infrared Sensor' is used in public broadcasting system.
- 'Iris Scan' is a type of biometric access control system.
The Correct Option is A, D
Solution and Explanation
Step 1: RFID (Radio Frequency Identification).
- RFID tags and readers are commonly used in electronic access control, e.g., smart cards, entry gates.
- Hence, (A) is true.
Step 2: Magnetic Loop Detector.
- Magnetic loop detectors are used under road surfaces for detecting vehicles (e.g., in parking management, traffic signals).
- They are not used for fire detection.
- Hence, (B) is false.
Step 3: Infrared Sensor.
- Infrared sensors are used in motion detection, thermal imaging, and automatic doors.
- They are not used in public broadcasting.
- Hence, (C) is false.
Step 4: Iris Scan.
- Iris recognition is a biometric technique widely used in secure access control systems.
- Hence, (D) is true.
Step 5: Conclusion.
Thus, only (A) and (D) are correct.
Final Answer: \[ \boxed{\text{(A) and (D)}} \]
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