When installing 60" concrete drain pipe, you apply a band approximately 7" wide and 1/2" thick. Then you smooth the band with a damp brush. You have proceeded:

When installing 60" concrete drain pipe, you apply a band approximately 7" wide and 1/2" thick. Then you smooth the band with a damp brush. You have proceeded:

• A. The band was not thick enough
• B. The band thickness is adequate
• C. The band was thicker than required
• D. The band width was incorrect

Answer: (B)

When joining large-diameter concrete pipe, the joint is sealed with a cementitious band around the joint. The critical dimension is the thickness of that band, and a half-inch thick provides enough material to fill minor gaps and form a solid bond with the surrounding concrete as it cures. The seven-inch width mainly ensures the band covers the joint area around the circumference, but the thickness is what determines the seal and structural integrity. Smoothing the band with a damp brush helps consolidate the material, eliminate voids, and produce a uniform surface for curing. If the band were thicker, it could interfere with fit or cause cracking; if it were thinner, gaps might remain. So this thickness is adequate.

When joining large-diameter concrete pipe, the joint is sealed with a cementitious band around the joint. The critical dimension is the thickness of that band, and a half-inch thick provides enough material to fill minor gaps and form a solid bond with the surrounding concrete as it cures. The seven-inch width mainly ensures the band covers the joint area around the circumference, but the thickness is what determines the seal and structural integrity. Smoothing the band with a damp brush helps consolidate the material, eliminate voids, and produce a uniform surface for curing. If the band were thicker, it could interfere with fit or cause cracking; if it were thinner, gaps might remain. So this thickness is adequate.