Answer :
Final answer:
The sample of concrete for making the slump test must be obtained in accordance with Practice ASTM C172, published by ASTM. This practice provides standard guidelines for obtaining and testing concrete samples.
Explanation:
The sample of concrete for use in making the slump test must be obtained in accordance with Practice ASTM C172. This practice is published by the American Society for Testing and Materials (ASTM) and provides standard guidelines for the procedure of obtaining and testing concrete samples to determine its workability or slump. It outlines the proper methods for collecting, mixing, and handling the concrete sample before performing the slump test.