When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will

Answer: Option D

Concept: In a journal bearing, the shaft is supported on a thin film of lubricant which separates the metal surfaces during rotation.

Slow speed condition: At slow speeds, the hydrodynamic pressure in the lubricant film is insufficient to fully separate the shaft from the bearing surface.

Effect of rotation direction: When the shaft rotates in an anticlockwise direction at slow speed, the load causes the shaft to shift within the bearing clearance. Due to the rotation and load combination, the shaft moves towards the left side of the bearing.

Metal-to-metal contact: In this condition, the lubricant film cannot maintain full separation, resulting in metal to metal contact between the shaft and the bearing surface on the left side.

Conclusion: At slow speed in anticlockwise rotation, the shaft moves towards the left of the bearing, causing direct metal-to-metal contact.