Canadian Council of Independent Laboratories (CCIL) Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

In a slump test, the measurement of the concrete's consistency is crucial for determining its workability. The required reading gradation for the measuring tape used in this test is specified to be 1mm. This fine gradation allows for precise measurement of the slump, which is the vertical distance that the concrete falls in the test. The accuracy of 1mm is essential, as even slight variations in slump can indicate significant differences in the concrete's ability to perform in its intended application.

Using a measuring tape with a 1mm gradation ensures that small changes in slump can be accurately recorded, leading to more reliable data which is critical for quality control and for meeting specified standards in concrete mixing and application. Thus, the precision inherent in a 1mm gradation supports the overall goal of ensuring structural integrity and suitability of the concrete mix used in construction projects.