What does a three-element feedwater regulator monitor?

Study for the Massachusetts 3rd Class Engineer Exam. Access flashcards and multiple choice questions with hints and explanations. Prepare for success on your exam!

A three-element feedwater regulator is designed to monitor and control the operation of a steam boiler system by keeping an optimal balance between several critical parameters. The correct answer indicates that it monitors drum level, steam flow, and feedwater flow.

The drum level is crucial because it ensures that there is enough water in the boiler to generate steam. If the water level is too low, this can lead to overheating and damage to the boiler. Steam flow is monitored to assess the amount of steam being produced and used. Finally, feedwater flow is essential to continuously supply water to the boiler, compensating for the steam that is generated and preventing the drum level from dropping too low.

This three-element system creates a closed-loop control that allows for precise adjustments to the feedwater flow based on real-time measurements of drum level and steam flow. In contrast, the other options refer to parameters that do not directly relate to the specific function of a three-element feedwater regulator. For instance, monitoring water temperature or air pressure falls outside its scope, which is focused solely on maintaining the correct balance of water and steam in the system.

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