Question 376Motor Plants - Assistant Engineer

The correct answer is B) cool the exhaust valves. In a two-stroke cycle diesel engine, the process of scavenging involves expelling the exhaust gases and drawing in fresh intake air. This scavenging process helps to cool the exhaust valves, preventing them from overheating and potentially failing. The other answer choices are incorrect because: A) Scavenging does not directly improve fuel flow volume. C) Scavenging does not reduce the intake air charge density, as it helps draw in fresh air. D) Scavenging helps reduce the temperature of the exhaust gases, not increase it.