A highly sophisticated Multi-Zone DFMD is capable of detecting

A

metallic items above a set threshold level.

B

metallic as well as non-metallic items.

C

metallic items, non-metallic items, as well as conventional explosives.

D

metallic items, non-metallic items, as well as all explosives including plastic and liquid explosives.

Explanation

A Door Frame Metal Detector (DFMD) is a security device that operates on the principle of electromagnetic induction to detect metallic objects (ferrous, non-ferrous, and alloys). The "Multi-Zone" feature refers to the device's ability to pinpoint the exact location of a metallic object on a person's body by dividing the frame into multiple detection zones (e.g., 6, 18, or 33 zones).

Threshold Level: Sophisticated DFMDs allow for sensitivity adjustments, enabling the device to ignore small personal items like coins or keys while detecting larger metallic threats above a specific threshold.
Limitations: By definition, a metal detector is designed to detect metal. It is not capable of detecting non-metallic items, plastic explosives, or liquid explosives. Detection of such materials requires different technologies, such as Millimeter Wave (mmWave) scanners or X-ray backscatter systems.

This question appeared in the UPSC CAPF (AC) 2023 exam, and the official answer is metallic items above a set threshold level.

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Question map

A highly sophisticated Multi-Zone DFMD is capable of detecting

Explanation

SIMILAR QUESTIONS

Metal detector is meant to detect the presence of which of the following in the search object ?

Which one of the following is not detected by fire detectors ?

Which one of the following elements cannot be detected by "Lassaigne's test"?