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

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 a quick, low-cost way to check a sewer line by shining a light through the pipe from one end and seeing if it can be seen at the far end. If the light passes through, the line is open and basically straight over that segment; if the light can’t be seen, there may be a blockage, sag, or misalignment. This method is inexpensive because it just needs a portable light and access points, and it’s fast because you don’t set up cameras or perform tests that take longer. Televising would provide a detailed image but costs more and takes more time; a water test looks for leaks rather than straightness; a Go or No Go Test checks a specific criterion or fit rather than the openness of the entire line.

Lamping is a quick, low-cost way to check a sewer line by shining a light through the pipe from one end and seeing if it can be seen at the far end. If the light passes through, the line is open and basically straight over that segment; if the light can’t be seen, there may be a blockage, sag, or misalignment. This method is inexpensive because it just needs a portable light and access points, and it’s fast because you don’t set up cameras or perform tests that take longer. Televising would provide a detailed image but costs more and takes more time; a water test looks for leaks rather than straightness; a Go or No Go Test checks a specific criterion or fit rather than the openness of the entire line.