| Referring to the illustration, suppose after initiating the oil discharge mode, the oily- water separator fails to come out of the oil discharge mode in a timely fashion. Cracking open the upper sampling valve reveals the presence of oil exiting under positive pressure. What is most likely the cause? Illustration GS-0175 |
| A) The clean water supply solenoid fails to open, and as a result provides no discharge pressure. |
| B) The oil discharge check valve fails to open, and as a result no oil actually discharges. |
| C) The lower oil/water interface detection probe fails to initiate the oil discharge mode. |
| D) The upper oil/water interface detection probe fails to end the oil discharge mode. |
