What adjustments should be made if a machine feels hot to the touch during operation?

The correct choice highlights the importance of diagnosing potential mechanical issues that can lead to excess heat during operation. If a machine feels hot to the touch, it is crucial to investigate underlying causes that could impact its performance and longevity.

Checking for misalignment is essential because misaligned components can create friction, generating excessive heat. Similarly, examining bearing conditions is important since worn or damaged bearings can also lead to increased friction and heat buildup. Inadequate lubrication is another critical factor—without sufficient lubricant, moving parts may grind against one another, resulting in heightened temperatures. Therefore, by performing this thorough check, one can identify and rectify issues that may cause overheating, thus ensuring the machine operates efficiently and safely.

The other options, such as increasing the operational speed, shutting down the machine, or relocating it, do not address the root problems that cause excessive heat and might exacerbate the situation. Increasing speed could lead to further overheating, while immediate shutdown might be necessary in some cases, it doesn't contribute to understanding and solving the issue at hand. Relocating the machine provides only a temporary fix and does not address the mechanical factors that are likely causing the overheating.