Which is an indication of a solid (not veneer) brick wall?

A solid brick wall, as opposed to a veneer wall, is often constructed with a specific pattern to enhance structural integrity and stability. The indication that every seventh course of bricks is turned sideways, also known as a bond course, is a traditional method used to interlock the bricks, reinforcing the wall's overall strength. This technique not only provides visual interest but also contributes to the wall's ability to withstand lateral forces and prevent cracking.

The other options do not necessarily indicate that a brick wall is solid. Uniformity in brick size may occur in both solid and veneer walls, and a smooth finish can be achieved in various types of construction, including veneers. Additionally, the visibility of mortar joints does not determine the type of wall; both solid and veneer walls can have visible mortar depending on the finishing technique used.