PE Civil Practice: Determining Sample Size for Concrete Strength Testing

NCEES Civil PE Specification Material, Production, and Execution Quality Control: Material test methods and specification conformance

Problem

How many 6-inch by 12-inch cylinders made from the same batch of concrete do we need to test to find the average concrete strength?

Select an Answer:

A) 2
B) 3
C) 4
D) 5

Practice Question: Determining Sample Size for Concrete Strength Testing