Strainers remove what size of contamination particles?

• A. Coarse particles
• B. Fine particles
• C. Micro particles
• D. Large particles

Answer: (A)

Strainers catch the big stuff by using a screen with relatively large openings. This means they remove coarse, or large, particles from the flow to prevent damage or clogging downstream. Because the openings are wide, fine and micro particles slip through, so strainers act as a preliminary barrier to remove coarse contamination before the fluid continues on. If the goal is to remove the smallest contaminants, a finer filter would be needed instead. Therefore, strainers are designed to remove coarse particles.