Question 144General 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 water exiting under a positive pressure. What is most likely the cause? Illustration GS-0175
AI Explanation
The correct answer is B) The upper oil/water interface detection probe fails to end the oil discharge mode.
This is the correct answer because the key information provided is that the oily-water separator fails to come out of the oil discharge mode in a timely fashion, and there is water exiting under positive pressure from the upper sampling valve. This indicates that the upper oil/water interface detection probe, which is responsible for sensing when the oil layer has been fully discharged and signaling the end of the oil discharge mode, has failed to function properly.
The other options are incorrect because they do not address the specific issue of the oily-water separator remaining in the oil discharge mode. For example, option A would result in no oil discharge at all, which is not the case here, and options C and D do not relate to the probe that controls the transition out of the oil discharge mode.
Related Questions
#142 Referring to the illustration, an oil/water separator is in the recirculation mode due to high oil content of the processed water outlet. What action may be required before the unit is capable of discharging overboard once again? Illustration GS-0175 #143 Referring to the illustration, suppose the oily-water separator vessel compound gauge is showing an unusually deep vacuum for operating in the separation processing mode with the separator service pump running. The oil content is 8.3 ppm. What is most likely the cause? Illustration GS-0175 #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 #147 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