Control valves
a. Must fail closed
b. Provide variable resistance in a piping system
c. Provide tight flow shut-off
d. Must modulate from fully open to fully shut
e. Are nearly always reverse acting
Answer: B
Control valves
a. Must fail closed
b. Provide variable resistance in a piping system
c. Provide tight flow shut-off
d. Must modulate from fully open to fully shut
e. Are nearly always reverse acting
Answer: B