Given;
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A direct-acting proportional pneumatic controller will be used to maintain level in a water storage tank by positioning an air-operated flow control valve in the tanks makeup water supply line.
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The controllers input will vary directly with tank level.
Which pair of flow control valves shown below will be compatible with the controller in the above application?
A. A and B
B. B and C
C. C and D
D. D and A
Show Answer
Answer: D
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