In general, the discriminant is an algebraic expression that gives. information about the roots of a polynomial. In the case of a quadratic equation the discriminant is the part of. the quadratic equation that is under the radical sign.
How to Select Dampers and Louvers. Dampers and louvers are used to control the flow of air in a process system or enclosed area. Dampers are usually motorized or manually-adjustable for flow control. Louvers are often fixed for a constant flow rate.
The MicroGuard filter is the lesser priced filter found at Oaâ¬â¢OÃ¢ Reilly Auto; parts it is more comparable to The ProSelect (proselect tested) here than NapaGold napagold Or. 1  MicroGuard microguard uses a leaf spring rather than a coil; spring the leaf spring must always seat properly onto the end.  cap MicroGuard uses weaker fiberboard end caps rather than the metal ones. 2  The center tube of the MicroGuard is not secured to the filter media or the endcaps. 3  Excessive glue was found where the pleats meet the fiberboard.