Question 147General Subjects - 1st Asst/Chief70% to pass
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
AI Explanation
The correct answer is B) The oil discharge check valve fails to open, and as a result no oil actually discharges.
This is the correct answer because if the oil discharge check valve fails to open, it would prevent the oil from being discharged from the oily-water separator, even though the system is in the oil discharge mode. This would result in the oil backing up and exiting the upper sampling valve under positive pressure, as described in the scenario.
The other answer choices are incorrect because: A) the clean water supply solenoid failing to open would not cause the oil to exit under positive pressure; C) the lower oil/water interface detection probe failing would not prevent the oil discharge mode from being initiated; and D) the upper oil/water interface detection probe failing would not cause the oil to continue discharging, but rather would fail to end the oil discharge mode.
Related Questions
#145 Referring to the illustration, suppose while in the oil separation processing mode, the oil content detector display screen shows 17.9 ppm and the oily-water separator is discharging back to the bilge water holding tank for recirculation. What is most likely the cause? Illustration GS-0175 #146 If item "1" in the illustrated oily-water separator indicates an abnormally deep vacuum, which of the following conditions is the most probable cause? Illustration GS-0153 #148 When the oily-water separator, shown in the illustration, is in operation and processing clear bilge water, what should be the internal water level? Illustration GS-0153 #149 The component labeled "A", as shown in the illustration would be identified as the _______________. Illustration GS-0175#150 The line labeled "C", as shown in the illustration would be identified as the _______________. Illustration GS-0175