Which code corresponds to Fire Alarm - Industrial/Utility?

• A. 3M
• B. 4
• C. 3I
• D. 3MC

Answer: (C)

The code system uses a number to signal the broad category and a letter to specify the subcategory. For Fire Alarm incidents, the number is 3, and the letter identifies the particular context. The letter I stands for Industrial/Utility, so 3I is the code for Fire Alarm – Industrial/Utility.

This makes sense because the other options either point to different subcategories (for example, a different letter would indicate a different kind of Fire Alarm situation) or don’t fit the standard pattern (such as using two letters or a different number). The key takeaway is that I denotes Industrial/Utility, hence 3I is the match for Fire Alarm – Industrial/Utility.