Question 30Steam Plants - 1st Asst/Chief

The correct answer is A) steam flow and drum water level. A two-element boiler feed water regulator is controlled by the steam flow and the drum water level. The steam flow provides information about the demand for steam, while the drum water level indicates the amount of water available for steam generation. By monitoring these two parameters, the regulator can adjust the feed water flow to maintain the proper water level in the drum and ensure a steady supply of steam. The other options are incorrect because they do not accurately describe the control inputs for a two-element boiler feed water regulator. Option B is incorrect as it uses drum pressure instead of steam flow. Options C and D are incorrect as they do not include both steam flow and drum water level as the control inputs.