The aggregate's nominal maximum size permitted in the container is 37.5 mm or smaller.

The aggregate's nominal maximum size permitted in the container is 37.5 mm or smaller.

• A. 50 mm or smaller
• B. 25 mm or smaller
• C. 100 mm or smaller
• D. 37.5 mm or smaller

Answer: (D)

Nominal maximum size is the largest particle size allowed in the aggregate for the mix. Saying the aggregate’s nominal maximum size is 37.5 mm or smaller sets the upper bound for particle size—that no piece bigger than 37.5 mm may be used. That’s why the option stating 37.5 mm or smaller is the correct reflection of the stated requirement. Larger limits like 50 mm or 100 mm would allow stones bigger than the limit, while a limit of 25 mm would be more restrictive than needed and doesn’t match the stated maximum.

Nominal maximum size is the largest particle size allowed in the aggregate for the mix. Saying the aggregate’s nominal maximum size is 37.5 mm or smaller sets the upper bound for particle size—that no piece bigger than 37.5 mm may be used. That’s why the option stating 37.5 mm or smaller is the correct reflection of the stated requirement. Larger limits like 50 mm or 100 mm would allow stones bigger than the limit, while a limit of 25 mm would be more restrictive than needed and doesn’t match the stated maximum.