Which of these does not provide a form of fuel filtration?

Which of these does not provide a form of fuel filtration?

• A. Filtration
• B. Sedimentation
• C. Distillation
• D. Reverse-osmosis

Answer: (D)

Think about what counts as filtration. Filtration uses a barrier to remove particulates as liquid passes through. Sedimentation removes solids by gravity, which is a separation step rather than filtering through a barrier, but it often accompanies filtration in fuel treatment. Reverse osmosis pushes liquid through a semi-permeable membrane to block dissolved substances, which is a classic filtration method. Distillation, on the other hand, separates components based on differences in boiling points by vaporizing and condensing, not by filtering through a barrier. So, distillation does not provide a form of fuel filtration.

Think about what counts as filtration. Filtration uses a barrier to remove particulates as liquid passes through. Sedimentation removes solids by gravity, which is a separation step rather than filtering through a barrier, but it often accompanies filtration in fuel treatment. Reverse osmosis pushes liquid through a semi-permeable membrane to block dissolved substances, which is a classic filtration method. Distillation, on the other hand, separates components based on differences in boiling points by vaporizing and condensing, not by filtering through a barrier. So, distillation does not provide a form of fuel filtration.