If You Pass This Quiz You Were Meant To Be A PlumberWhat is the most convenient method to check whether an underground drainage pipe is damaged?70%Next Correct Incorrect No need to excavate, can directly view the internal condition of the pipe What is the most convenient method to check whether an underground drainage pipe is damaged? Dig up the pipe for direct inspection Use a pipeline endoscope for detection Pour water into the pipe and observe Tap the pipe with your hand and listen to the sound 70%
