What determines how many operators must attend a boiler being placed in service?

The requirement for the number of operators needed when placing a boiler in service is primarily determined by the capacity of the boiler. Larger capacity boilers often present increased risks and demand more stringent safety measures, which can necessitate additional operators to ensure safe and effective operation. Capacity is the critical factor because it relates directly to the operational pressure, temperature, and potential hazards associated with the boiler’s operation, thus influencing the safety protocols that need to be followed.

Options relating to the size of the boiler and the type of fuel can also be important; however, they do not have the same direct correlation to staffing requirements as capacity does. While the operator's experience level is vital for safe operation, it does not dictate the number of operators needed to manage a boiler’s functioning effectively. In essence, capacity outlines the operational demands that inform staffing levels for safety and compliance in boiler operations.