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Referring to the illustrated pneumatically-operated diaphragm-actuated control valve, what statement is true? GS-0051 |
A) The control valve is direct-acting and normally open (NO). |
B) The control valve is indirect-acting and normally open (NO). |
C) The control valve is direct-acting and normally closed (NC). |
D) The control valve is indirect-acting and normally closed (NC). |
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Illustration GS-0051Comments |
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