1. Which statement is true regarding bearings used in high-powered reciprocating aircraft engines? A. The outer race of a single-row, self-aligning ball bearing will always have a radius equal to the radius of the balls. B. There is less rolling friction when ball bearings are used than when roller bearings are employed. C. Crankshaft bearings are generally of the ball-type due to their ability to withstand extreme loads without overheating.