Which term describes the marks that show modifications from previous standards?

Which term describes the marks that show modifications from previous standards?

• A. Changes Indication
• B. Layout and Calculation
• C. Metric units
• D. Liter

Answer: (A)

Understanding how updates are shown in NFPA standards helps you quickly spot what’s changed from an earlier edition. The marks that indicate what has been modified from the previous standard are called changes indication. These marks point out updated language, figures, or requirements so you can compare editions efficiently and see exactly what was altered. Layout and calculation refers to how the system is arranged and the hydraulic or design calculations, not to marking changes between editions. Metric units and liter are about measurement units, not about signaling revisions.

Understanding how updates are shown in NFPA standards helps you quickly spot what’s changed from an earlier edition. The marks that indicate what has been modified from the previous standard are called changes indication. These marks point out updated language, figures, or requirements so you can compare editions efficiently and see exactly what was altered.

Layout and calculation refers to how the system is arranged and the hydraulic or design calculations, not to marking changes between editions. Metric units and liter are about measurement units, not about signaling revisions.