What type of fitting fits over the open end of a pipe to seal it?

Question

Quizplus · Accepted Answer

A) Correct. A cap fits over the open end of a pipe to seal it.
B) Incorrect. A plug fits inside the open end of a pipe to seal it.
C) Incorrect. A bushing is a pipe fitting that is threaded on both the internal and external surfaces; it is used to join two pipes of differing sizes.
D) Incorrect. A coupling is a short piece of pipe or "collar" used to join two lengths of pipe.

What Type of Fitting Fits Over the Open End of a Pipe