Question 294Motor Plants - Assistant Engineer

The correct answer is B) The solenoid valve is closed and the bypass valve is closed. During the normal operation of the centrifuge, the operating liquid solenoid valve should be closed to prevent liquid from entering the centrifuge, and the bypass valve should also be closed to ensure that the liquid is properly processed through the centrifuge. This configuration ensures that the centrifuge operates as intended, with the liquid being separated or cleaned without any bypassing or leakage. The other options are incorrect because they do not properly describe the correct valve positions for the normal operation of the centrifuge. For example, having the solenoid valve open and the bypass valve closed (option C) would allow liquid to enter the centrifuge, while having both valves open (option D) would allow the liquid to bypass the centrifuge altogether.