Question 171General Subjects - 1st Asst/Chief

The correct answer is A. The main purpose of the main thrust bearing is to absorb the axial thrust developed by the propeller and transmit that thrust to the ship's hull. This ensures that the axial forces generated by the propeller are properly supported and do not cause undue stress on the propeller shaft or other components. The other answer choices are incorrect because they do not accurately describe the primary function of the main thrust bearing. Option B is incorrect because the main thrust bearing's purpose is to absorb axial thrust, not maintain shaft alignment. Option C is incorrect because the main thrust bearing is designed to handle axial, not radial, forces. Option D is incorrect because the main thrust bearing is not meant to transmit radial thrust to the hull.