507. Diesel engine piston ring gaps can be straight or angle cut. In comparison, the angle cut ring __________.

Angle-cut piston rings reduce combustion gas leakage because the angled joint creates a longer, less direct path for gas, minimizing blow-by compared to straight-cut rings. Piston ring expansion requires a gap regardless of cut type, and ring tension is determined by material and design, not the gap angle; the angle cut does not improve ring wear.