Which item is NOT listed as part of the group that can be stored together?

• A. Det cord
• B. Dynamite
• C. Cast primers
• D. Ordinary fuse

Answer: (D)

In blasting storage, materials are grouped by how their hazards and compatibility stack up, so items with similar characteristics can be kept together under the same safety rules. Det cord, dynamite, and cast primers are all energetic blasting components that share similar initiating and explosive properties, so they fit in the same storage group. Ordinary fuse, on the other hand, is a different type of initiating device with its own handling and storage considerations, so it isn’t included in that group. Keeping like with like reduces the risk of unwanted interactions and helps enforce appropriate safety controls.