M/NM Blasters' Exam III Progress Indicator: Question 1 of 20 1.  A unit, package, or cartridge of explosives used to initiate other explosives or blasting agents, and which contains: 1) A detonator, or 2) detonating cord to which is attached a detonator designed to initiate the detonating cord. Choices: Primer Base Charge Cutoff Signs-Explosive (Placards)