Massachusetts Construction Supervisor License (CSL) Practice Test

What is the maximum allowed slump of concrete when using removable forms?

1. 3 inches

2. 4 inches

3. 5 inches

4. 6 inches

The correct answer is: 6 inches

In the context of using removable forms for concrete, the maximum allowed slump is indeed 6 inches. When concrete is placed into removable forms, the slump measurement is crucial because it indicates the workability of the concrete mix. A higher slump allows for easier placement and consolidation within forms, especially in more complex or detailed structures. The maximum 6-inch slump standard ensures that the concrete is fluid enough for application without sacrificing the structural integrity that comes with a properly mixed concrete. This allows for adequate compaction while still maintaining the durability and strength necessary for the final structural component. In contrast, lower slump values, such as 3, 4, or 5 inches, would imply a drier mix that could make placement more difficult and might not flow well into those intricately shaped areas of the removable forms, potentially leading to incomplete filling or weak spots within the concrete structure.