Question 702Steam Plants - Assistant Engineer

The correct answer is C) Q. The three-wing device in the unit illustrated is maintained in its position by item Q, which is the adjusting screw. This screw is used to adjust the position and tension of the three-wing device, ensuring it remains securely in place. The other answer choices are incorrect because: A) O is the main body of the unit, which does not directly maintain the position of the three-wing device. B) P is the wing pivot, which allows the three-wing device to move, but does not maintain its position. D) R is the wing, which is part of the three-wing device itself, not the mechanism that keeps it in place.