Question 121Motor Plants - Assistant Engineer

The correct answer is A) P. The scavenging air system non-return valve is represented by the letter P in the illustration MO-0003. This is based on the standard labeling conventions used in marine engineering diagrams, where the non-return valve in the scavenging air system is typically designated with the letter P. The other answer choices are incorrect because Q, W, and U likely represent different components in the overall system, such as valves, connections, or other equipment, but they do not specifically indicate the scavenging air system non-return valve.