It is very important when commissioning a piping system to be aware of the piping expansion. A very close watch must be kept on:
1. Piping anchors
2. Expansion joints
3. Pipe bends
4. Valves and flanges
a) 1, 2
b) 2, 3
c) 3, 4
d) 2, 3
e) 1,4
Answer: A