How many journal bearings are used in the MG?

The correct answer is based on the specific design of the MG (which refers to a type of machinery or system, such as a generator or motor) that utilizes a specific number of journal bearings to support its rotating components. Journal bearings play a critical role in providing support to the shaft, reducing friction, and facilitating smooth rotation during operation.

In various types of machinery, the number of journal bearings is determined by factors such as the size and load requirements of the machine, as well as the configuration of its mechanical components. For the MG in question, an established design has determined that 26 journal bearings are optimal for achieving the necessary balance between support, stability, and operational efficiency.

The other choices may suggest numbers that either exceed or fall short of the design specifications, indicating an incorrect understanding of how many bearings are required for the specific operational demands of the system. Thus, the answer of 26 reflects both the engineering principles involved in such machinery design and adherence to proven specifications in practice.