The pneumatic circuit shown in the illustration is part of a complex large low-speed engine control system. Which of the following statements describes the function of this circuit? Illustration MO-0117 |
A) The circuit shown is used to shift the camshaft position when reversing the engine. |
B) The piston labeled A provides a low-pressure signal to the other components illustrated. |
C) Valve D, when depressed, allows the retained pneumatic pressure within the shutdown servomotor to be relieved. |
D) When oil pressure to valve C is diminished, a pressure decrease is developed at valve D, causing it to shift, and nullifying the actuating signal to device A. |