What type of fitting fits over the open end of a pipe to seal it?
A) Cap
B) Plug
C) Bushing
D) Coupling
Answer: A
Explanation: 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.
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