Question 148Steam Plants - Assistant Engineer70% to pass
A major difference between the two element and the three element feed water regulator control systems is that a three element system will additionally measure and incorporate the _______________.
AI Explanation
The correct answer is B) feed water flow as a sensed variable.
The key difference between a two-element and a three-element feed water regulator control system is that the three-element system incorporates the feed water flow as an additional sensed variable, along with the steam flow and drum water level. This allows the three-element system to more precisely control the feed water flow to match the steam demand, resulting in better overall boiler water level control.
The other answer choices are incorrect because they do not represent the additional sensed variable that distinguishes the three-element system. A two-element system does not measure feed water flow, while the other options (steam flow, fuel oil flow) are not the defining characteristic of the three-element system.
Related Questions
#146 A pneumatic dual element, main propulsion, boiler feed water regulating system commonly used aboard ship utilizes _______________.#147 A single element boiler feed water regulating system used aboard ship utilizes _______________.#149 The purpose of the cam-actuated steam valve used in a boiler soot blower system is to _______________.#150 The boiler shown in the illustration, arrow "O" indicates the Illustration SG-0007 #151 The purpose of the pressure control disk installed in the multi-nozzle soot blower, as shown in the illustration, is to _______________. Illustration SG-0023