How frequently should the water level be checked during boiler operation?

The water level in a boiler should be checked frequently as part of routine monitoring due to the critical nature of maintaining proper water levels for safe and efficient boiler operation. Monitoring the water level helps to prevent issues such as overheating, system failure, and potential explosive situations that can arise if the water level falls too low. Regular checks allow operators to detect any anomalies early, ensuring that the boiler remains within safe operating parameters.

Frequent checks also align with best practices in boiler management, where operators are encouraged to be aware of fluctuations in water levels that can result from changes in operation or external factors. The other choices suggest less proactive monitoring, which could lead to serious consequences if water levels are not properly maintained.