Final answer:
The maximum amount of material that should be machined from a passenger car brake drum is 0.040 inch.
Step-by-step explanation:
The question asks for the maximum amount of material that should be machined from a passenger car's brake drum in lieu of Maximum Material Condition (MFS). The correct answer is 0.040 inch (b).
In engineering, MFS refers to the largest size limit for a part's feature. In this case, it denotes the maximum amount of material that can be safely removed from the brake drum.
By choosing the maximum amount of material that should be machined from the brake drum, it ensures the integrity and safety of the braking system. Removing too much material can compromise the structural strength and performance of the brake drum.