Which testing method is described as an inexpensive and quick way to determine if a sewer line is straight and open?

• A. Televising
• B. Lamping
• C. Go or No Go Test
• D. Water Test

Answer: (B)

Lamping is the quickest, most inexpensive way to check a sewer line for openness and alignment. By inserting a bright light into one end of the pipe and looking from the opposite access, you can instantly see whether the line is clear and roughly straight. If the light is visible along the length without major dark spots, kinks, or obvious blockages, the pipe is open and mostly straight. This method is simple, requires little equipment, and can be done in the field right away, which is why it’s favored when you need a fast, low-cost check.

Televising uses a camera and is more thorough but also more expensive and time-consuming. A water test looks for leaks or infiltration by filling the pipe and observing changes over time, but it doesn’t reliably show straightness or overall openness. A go or no go test is a broader fit/tolerance check and doesn’t specifically target determining whether the line is straight and open.