Final answer:
A main thrust bearing indeed limits end play, which is the axial movement of a shaft within machinery. This is crucial for maintaining the correct shaft alignment and ensuring proper machine function.
Step-by-step explanation:
The student's question 'A Main thrust bearing limits blank end play. True or False' is seeking to confirm whether a main thrust bearing is designed to limit the axial or end play movement of a shaft within a machine. The answer to this question is True. Main thrust bearings are specifically designed to manage the axial loads and restrict the axial movement of the shaft, ensuring that it remains aligned within its designated operational parameters. This control of end play is essential for the proper functioning of many types of machinery, particularly in high-speed or high-load environments where precise shaft alignment is critical.