Which term describes the failure of a primer or propelling charge to function?

The term that describes the failure of a primer or propelling charge to function is "Misfire." In the context of explosives and ammunition, a misfire occurs when the firing mechanism does not ignite the primer, leading to the failure of the projectile to be discharged as intended. This can happen for several reasons, such as a defect in the primer, issues with the ammunition, or an error in the firing sequence.

Understanding misfires is crucial for EOD personnel, as they need to identify and safely manage situations involving unexploded ordnance or failed detonations to prevent accidents and ensure safety during operations.

Other terms, while related to explosive interactions, do not specifically relate to the failure of a primer or charge to ignite. A malfunction typically refers to broader failings in equipment or machinery, while detonation refers to the rapid explosion of an explosive material and grounding pertains to the process of safely discharging static electricity or providing a path for electrical current.