Question 13Steam Plants - 1st Asst/Chief

The correct answer is D) cycled on and off in response to steam demand. Constant capacity, pressure atomizing fuel burners are designed to cycle on and off in response to changes in the steam demand on the auxiliary boiler. This allows the burners to meet a wide variation in steaming loads without the need for complex variable capacity atomizers. The burners are simply turned on and off as needed to maintain the desired steam pressure and output, rather than being automatically supplied with more fuel or warmer air on demand. The other options are incorrect because they do not accurately describe how these types of fuel burners function. They do not automatically adjust the fuel or air supply, but rather cycle the burners themselves to meet the changing steam load requirements.