Question 694Steam Plants - Assistant Engineer

The correct answer is D) Ring-oiled, Babbitt-faced, spherical seat, shell. This type of bearing is commonly used as a line shaft bearing in maritime applications. The key features that make it suitable for this purpose are the ring-oiling system, which automatically lubricates the bearing, and the Babbitt-faced shell which provides a durable and self-lubricating surface. The spherical seat allows for some misalignment of the shaft, making it a reliable choice for line shaft applications. The other options are not typically used as line shaft bearings. Option A is a radial sleeve bearing, which is more commonly used in electric motors. Option B is a thrust bearing, designed to handle axial loads rather than radial loads. Option C is a tapered roller bearing, which is better suited for higher-speed applications than a typical line shaft.