Which of the following roller bearing types would be limited to radial thrust load applications?

Correct Answer: Option D — single row cylindrical roller bearing

Cylindrical roller bearings are designed specifically to support high radial loads due to the line contact between the rollers and the raceways. Unlike tapered or spherical designs, they lack the geometry required to accommodate significant axial (thrust) loads, making them unsuitable for applications where end-play or thrust forces exist.