Which one of the following is not part of DFMD ?

[amp_mcq option1=”Electronic Unit” option2=”Lead Curtain” option3=”Remote Control Unit” option4=”Cross Piece” correct=”option2″]

This question was previously asked in

UPSC CISF-AC-EXE – 2020

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A Lead Curtain is not a standard component of a Door Frame Metal Detector (DFMD).

– DFMDs use electromagnetic fields to detect metallic objects as a person walks through the frame. Key components include the electronic unit (generating fields, processing signals), the frame structure (cross piece, side panels), and sometimes a remote control or interface.
– Lead curtains are used for shielding against X-rays, commonly found in X-ray baggage scanners to protect operators and the environment from radiation. They are not part of the metal detection principle.

Understanding the basic working principles of common security screening equipment helps differentiate their components. DFMDs rely on electromagnetism, while X-ray scanners rely on ionization radiation and require shielding materials like lead.

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