What parameters does a control system monitor for boiler efficiency?

• A. Only temperature and feedwater flow
• B. Only steam pressure
• C. Pressure, temperature, and combustion efficiency
• D. Fuel source and feedwater quality

Answer: (C)

A control system for a boiler typically monitors multiple parameters to ensure optimal efficiency and safe operation. Monitoring pressure, temperature, and combustion efficiency is integral to evaluating how effectively the boiler is functioning.

Pressure is essential as it helps determine the energy output and the operational state of the steam system. Temperature measurements indicate the heat exchange effectiveness within the boiler and help prevent conditions that could lead to overheating or inefficient combustion. Combustion efficiency is a critical metric that reflects how well the boiler utilizes the fuel, determining the system's overall thermal performance and energy consumption.

Monitoring these parameters allows the control system to make necessary adjustments, ensuring the boiler operates within safe and efficient ranges. This comprehensive approach ensures not just energy efficiency but also safety and reliability in boiler operation. Other options may consider specific aspects of boiler performance in isolation, but they do not encompass the broader view necessary for optimizing boiler efficiency.