Repairing Clay-Fortified Areas Quiz Please sign up for the course before taking this quiz. Which size tamp will give you the maximum pounds per square inch (psi) of pressure when tamping?1 6 x 6 tamp. 8 x 8 tamp. 8 x 10 tamp. 10 x 10 tamp. To insure proper binding of new clay with existing clay in a repair area, be sure to:1 mix existing soil and topdressing with the new clay. sweep all loose soil and contamination out of the wear holes. further excavate the wear areas. Both A & C. When shaving down high spots during the repair of clay wear:1 use a sharpened iron rake. crosscut your raking pattern. use the existing grade around the patch to judge when the patch is at the proper grade. All of the above. Pre-moistened clay is preferred in clay repair because:1 it adheres to the existing clay in the repair area better than dry clay. it binds together very easily. it makes the field easier to chalk over. Both A & B.