Question 158Motor Plants - 1st Asst/Chief

The correct answer is C) formation of excessive quantities of condensate. Maintaining the lowest possible scavenging air temperature is not recommended because it can lead to the formation of excessive quantities of condensate. This is due to the fact that colder air has a lower capacity to hold moisture, which can result in water condensing out of the air and accumulating in the engine. This condensate can cause various issues, such as increased wear on engine components and potential damage to the lubricating oil. The other options are incorrect because they do not directly address the primary concern with maintaining excessively low scavenging air temperatures. Reducing compression pressure (A), increasing air charge density (B), and excessively cooling the piston crown surfaces (D) are not the primary reasons why the lowest possible scavenging air temperature is not recommended.