Question 147Steam Plants - Assistant Engineer70% to pass
A single element boiler feed water regulating system used aboard ship utilizes _______________.
AI Explanation
The correct answer is A) proportional action.
A single element boiler feed water regulating system used aboard ship utilizes proportional action. This means the control system adjusts the feed water flow to the boiler in direct proportion to the deviation between the actual water level and the desired water level in the boiler. This simple proportional control is sufficient to maintain a relatively stable water level in the boiler without the need for more complex control actions like reset or rate.
The other options are incorrect because they describe more advanced control actions that are not necessary for a basic single element boiler feed water regulating system. Options B, C, and D would involve additional control features beyond just proportional action.
Related Questions
#145 Which type of feed water regulator listed provides the MOST effective regulation of boiler water level under all operating conditions? #146 A pneumatic dual element, main propulsion, boiler feed water regulating system commonly used aboard ship utilizes _______________.#148 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 _______________.#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