General Contractor Practice Exam 2025 – All-in-One Guide to Exam Success!

The correct choice indicates that a minimum distance of 1/4 inch is required between block and rebar when grouting with coarse grout on a hollow masonry unit. This specification is based on several key factors related to the performance and structural integrity of the construction.

Maintaining a minimum distance is crucial to ensure proper grout flow and to achieve adequate bonding between the grout and the masonry unit. If the distance is too small, it may hinder the flow of the grout, leading to incomplete filling of the cores within the block and potentially compromising the structural integrity of the assembly. The 1/4 inch requirement allows sufficient space for the grout to adequately fill the voids without being restricted, ensuring a reliable connection between the components.

Additionally, this distance helps prevent issues such as air pockets or voids that could weaken the reinforcement provided by the rebar. It is also in line with the industry standards and practices which specify minimum clearances to achieve optimal grout distribution.

In contrast, smaller distances could lead to the risks mentioned, while larger distances, although might seem more accommodating for grout flow, would be unnecessarily excessive and not conform to common construction practices aimed at both efficiency and structural reliability.