List advantages of diaphragm valves:
1) The diaphragm is separated from the fluid and no packing material is required as in conventional valves.
2) Maintenance costs are much lower than conventional valves.
3) The bonnet assembly can be removed for cleaning or lubricating without shutting off the fluid in the line.
4) A positive tight seal is always maintained.
5) Diaphragm valves can be used in all services.
a. 1, 2
b. 2, 3
c. 1, 3
d. 3, 4
e. 2, 5
Answer: C