Small drilling machines are used to connect service lines ______ or smaller.

• A. 1 inch
• B. 3 in
• C. 2 in
• D. 4 in

Answer: (C)

Small-diameter service connections are handled with compact tapping equipment, so the connection method is appropriate for lines up to a certain size. The limit for using small drilling machines is 2 inches, which is why the statement reads that service lines 2 inches or smaller are connected this way. This threshold keeps the operation practical and minimizes disruption on the main line. Larger service connections—3 or 4 inches—require bigger equipment and different tapping methods, while 1 inch is technically smaller than the limit but isn’t the threshold being described.