Engine_2014 : Steam Plants - 546/1951
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| In addition to monitoring flame quality, flame scanners are used in combustion control systems to __________ . |
| A) regulate the air/fuel ratio controller for more efficient combustion |
| B) secure the forced draft fans upon flame failure |
| C) automatically open the fuel oil solenoid valves |
| D) secure the fuel supply in the event of a flame failure |
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