Which of the following components can be supported by friction bearings in diesel engines?

Friction bearings, often referred to as plain bearings, are widely used in diesel engines to support various moving components. The correct answer indicates that they can indeed support not just the crankshaft but also the connecting rods and other components.

In a diesel engine, friction bearings are crucial because they provide a smooth surface for rotating parts, reducing friction and wear, which is essential for the engine's efficiency and longevity. The crankshaft operates in a constant state of rotation within its bearing supports, and this is also true for the connecting rods, which transfer motion to the pistons, as well as for other moving parts that require stable support to function properly.

While the other responses may suggest limited applications of friction bearings, it is important to recognize that friction bearings are designed to accommodate multiple components within the engine assembly, ensuring smooth and reliable operation across various moving parts.