True or False: A constructive joint is a groove made in a concrete slab to control cracking.

A constructive joint, commonly referred to as a control joint, indeed serves the purpose of controlling cracking in a concrete slab by creating a weakened plane. This allows for organized movement of the concrete as it expands and contracts with temperature changes, moisture content, and drying.

The term "constructive joint" may be misleading or not commonly used in the industry, which could lead to confusion regarding its definition and purpose. Therefore, identifying this as a control joint is crucial to understanding its function effectively.

Given the nature of joints in concrete applications, the answer should clarify that the initial statement is not accurately defined within the context of standard construction terminology concerning concrete work. This precisely highlights why the true/false statement is marked as false, as it does not align with universally accepted terminology and understanding.