Impingement filters select one: a. are most effective at holding large particles on the fibres. o b. use the process of inertial impaction to remove particles o c. increase in effectiveness over time. o d. remove particles that are too large to pass through the gaps in the filter fibres. the rate of filtration is select one: o a. modified by boundary layer effects. b. increased with increasing viscosity of the fluid being filtered. c. decreased with increasing viscosity of the fluid being filtered. o d. independent of the viscosity of the fluid being filtered.