Question 142Motor Plants - QMED

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 lower air temperatures result in increased moisture content in the air, which can then condense inside the engine, leading to potential issues such as cylinder corrosion and lubricating oil dilution. The other options are incorrect because: A) higher air charge density is generally desirable for improved engine performance, B) colder piston crown surfaces can actually be beneficial for reducing heat losses and improving efficiency, and D) compression pressure should not be greatly reduced as this would negatively impact engine power output.