Question 190Motor Plants - QMED

The correct answer is C) Notify the watch or duty engineer immediately. The reasoning for this is that the presence of a significant amount of water discharge when blowing down the charge air cooler or scavenging air receiver on a main propulsion diesel engine indicates a potential issue that requires immediate attention. This could be a sign of a leak, malfunctioning equipment, or other problem that could lead to further damage or safety concerns if not addressed promptly. Notifying the watch or duty engineer immediately allows them to investigate the issue and take appropriate corrective actions without delay. The other options are incorrect because they involve delaying the notification, which is not the appropriate response for a potentially serious machinery issue that requires timely attention.