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.
damper. noun dampÂ·er \Ëdam-pÉr\. Tweet. : a flat piece of metal in a fireplace, furnace, etc., that controls the amount of air that can enter. : a small piece of wood inside a piano that is covered with cloth and that stops the movement of a piano string.