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| Referring to the illustrated pneumatically-operated diaphragm-actuated control valve, what statement is true? GS-0051 |
| A) The control valve has a single disc which is upward seating. |
| B) The control valve has a single disc which is downward seating. |
| C) The control valve has two discs which are both upward seating. |
| D) The control valve has two discs which are both downward seating. |
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Illustration GS-0051
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