How does drum level control maintain safe boiler operation?

How does drum level control maintain safe boiler operation?

• A. It uses feedwater valve to regulate based on steam demand only.
• B. It uses feedback from level indicators to regulate feedwater flow, keeping the water level within safe limits to avoid overfill or low-water conditions.
• C. It uses stack gas composition to set water level.
• D. It is manual only.

Answer: (B)