What will be the likely result if the piston ring gaps happen to be aligned when performing a differential-pressure compression check on a cylinder?

When performing a differential-pressure compression check, it is critical for the gaps in the piston rings to be staggered. If the piston ring gaps are aligned, there is a higher likelihood that the engine will not be able to maintain proper compression. This is due to the potential for leakage to occur through the aligned gaps, allowing compressed air to escape.

When the gaps are lined up, it significantly reduces the effectiveness of the ring's sealing ability, which can lead to a false indication of wear or defects in the rings themselves. Therefore, observing aligned gaps during this testing procedure can suggest that the piston rings are worn or defective as they are not performing their sealing function properly.

In contrast, staggered gaps help to create a better seal, enhancing compression efficiency, and are crucial for the normal operation of the engine. Hence, the situation described with aligned gaps indicates a concern that requires further investigation and possibly corrective measures on the piston rings.