AZ ROC CR-15 Blasting Practice Questions - Arizona ROC CR-15 Blasting Examination Exam

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According to ATF 27 CFR Part 555 regulations, what are the standard wall construction requirements for a Type 1 permanent outdoor high explosives storage magazine?

Minimum 1/8-inch sheet steel lined with 2 inches of exterior plywood Minimum 1/4-inch steel exterior lined with 4 inches of solid hardwood or equivalent interior masonry Double-walled 18-gauge sheet metal with hollow fiberglass insulation cavity Reinforced concrete minimum 2 inches thick with aluminum interior paneling

Correct Answer:

Minimum 1/4-inch steel exterior lined with 4 inches of solid hardwood or equivalent interior masonry

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