Which of the following is not a listed explosive stimulus?

• A. Friction.
• B. Induction.
• C. Impact.
• D. Heat.

Answer: (B)

Explosives are evaluated for sensitivity to specific initiation forces, and the common listed stimuli are friction, impact, and heat. Friction can create enough localized heat or shock to ignite a material; impact delivers a sudden energy impulse that can trigger sensitive compounds; heat raises temperature toward a decomposition or ignition point. Induction, by contrast, involves energy transfer through a changing magnetic field and is not considered one of the standard direct initiation stimuli used in these safety lists. It may play a role in electrical systems or specialized initiation setups, but it’s not categorized with the usual explosive stimuli, so it is the one that doesn’t fit.