Question 368Motor Plants - Assistant Engineer

The correct answer is C) reduce the opportunity for the formation of sulfuric acid in the cylinder bore exhaust passages. Explanation: Increasing the cooling water temperature from 180°F to 225°F reduces the likelihood of sulfuric acid formation in the cylinder bore exhaust passages. At lower temperatures, the exhaust gases can condense and form sulfuric acid, which can lead to corrosion. By raising the cooling water temperature, the exhaust gases remain hotter, preventing this condensation and reducing the risk of sulfuric acid formation. The other options are incorrect because: A) higher cooling water temperature does not directly impact scale formation, B) higher cooling water temperature typically increases fuel consumption, and D) higher cooling water temperature does not necessitate smaller water passages within the engine.