Question 203Steam Plants - 1st Asst/Chief70% to pass
As found in a basic pneumatic automatic combustion control system, the function of a standardizing relay is to _______________.
AI Explanation
The correct answer is B) introduce a control for maintaining constant steam pressure regardless of boiler load.
In a pneumatic automatic combustion control system, the standardizing relay is responsible for maintaining a constant steam pressure regardless of the boiler load. It does this by adjusting the air supply to the burner to match the steam demand, ensuring that the steam pressure remains stable even as the load on the boiler changes.
The other options are incorrect because they do not accurately describe the function of the standardizing relay in this type of system. Option A relates to maintaining constant superheated steam temperature, option C describes a backup for manual control, and option D is about controlling the boiler drum water level, none of which are the primary function of the standardizing relay.
Related Questions
#201 In an automatically fired boiler, the steam pressure regulator controls the supply of fuel oil to the burners by responding to variations in the _______________.#202 Fine adjustments to a boiler combustion control system, to bring about near perfect combustion, should be made by manually adjusting the _______________.#204 In automatic combustion control systems, increasing or decreasing a loading pressure by a set amount is called _______________.#205 Flame scanners are used with boiler combustion control systems to monitor flame quality and to _______________.#206 The photoelectric cell installed as part of the combustion safety controls of an automatically fired boiler will _______________.