Engine : Steam Plants - 510/811
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| Which of the following actions takes place in the control circuit of an automatically fired auxiliary boiler when the desired steam pressure is obtained? |
| A) A temperature sensing device opens the circuit breaker in the burner motor. |
| B) The high limit control secures power to the entire oil firing system. |
| C) The stack relay actuates the low limit control which breaks the ignition circuit. |
| D) The stack relay secures power to the high voltage side of the ignition transformer. |
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