Engine_2014 : Motor Plants and Auxiliary Boilers - 1745/2614
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| According to 46 CFRs, which of the following devices is prohibited for use on automatic auxiliary boilers? |
| A) Flame safeguard controls. |
| B) Mercury tube actuated controls. |
| C) Solenoid operated fuel valves. |
| D) Pneumatic combustion controls. |
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