Question 128Motor Plants - QMED

The correct answer is D) automatically regulates the quantity of oil and air flow to the burner. The pressuretrols installed on auxiliary boilers sense changes in steam pressure and automatically adjust the oil and air flow to the burner. This helps maintain the proper combustion conditions and steam pressure within the boiler. The pressuretrols act as a safety device to prevent dangerous pressure fluctuations. The other options are incorrect because: A) the feedwater control handles that task, B) the water level controls monitor the high water level, and C) the fusible plug secures the fire if the water level gets too low, not the pressuretrols.