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ASF ACT 1975 (Dec 2012) QUESTION #891
Question 1
"Trace Detection" technology (ETD) is a measure to maintain order by identifying:
  • Metal objects
  • Microscopic explosive particles✔️
  • Stolen currency
  • Overweight bags
Correct Answer Explanation
Explosive Trace Detectors are used when physical search or X-ray is insufficient to clear a suspicion of "Sabotage" (Section 6).