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Which one of the following is not an essential component of Improvised

June 1, 2025 by rawan239

Which one of the following is not an essential component of Improvised Explosive Device (IED)?

Explosive

Detonator

Mechanical timer/Mechanical clock

Power source

This question was previously asked in

UPSC CISF-AC-EXE – 2021

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An Improvised Explosive Device (IED) fundamentally requires an explosive charge and a method to initiate it (detonator/initiator). Often, a power source is needed to enable the initiation mechanism, especially for electronic or timed devices. A mechanical timer or mechanical clock is one specific type of initiator delay mechanism, but it is not essential for *all* IEDs. An IED could use a different initiation method, such as a simple fuse, a pressure plate, a remote trigger, or a different type of timer (electronic, chemical). Therefore, the mechanical timer/clock is the least essential component among the options listed for a general IED definition.

The essential components of most IEDs are the explosive fill, the detonator, and an initiation system (which may include a power source and a trigger/timer mechanism). Different types of initiation systems exist; a mechanical timer is only one example of a delay mechanism.

IEDs are highly variable in design and components, limited only by the knowledge and materials available to the builder. The primary components enable the device to function as an explosive weapon: the explosive material provides the destructive energy, and the detonator/initiator causes the explosive to detonate. The method of triggering can vary widely, including command detonation (remote), time delay (mechanical, electronic, chemical), or victim-operated (pressure plate, tripwire).

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