Which statement about crankshaft connecting rod journals is true?

The statement regarding crankshaft connecting rod journals being measured at the center and ends is accurate because it addresses the importance of assessing the entire journal surface for any signs of wear or irregularities. Measuring at both the center and the ends ensures a comprehensive evaluation of the journal's condition. This approach allows for detecting variations that may occur due to factors such as uneven wear patterns or misalignment, which can affect engine performance and longevity.

When only measuring at the center, critical wear or damage that might occur near the ends could go unnoticed, leading to potential failure or inadequate performance. Accurately measuring at both these areas provides a more complete picture of the journal's integrity and helps to ensure proper fitting of the connecting rod, maintaining optimal engine function.