Autodesk 235B1-05A761-1301 User Guide - Page 833

part size In Content Builder a specific set of values applied to the parametric model to define a single size. part size name The default name of a part stored in the part catalog and used when selecting parts during layout. path angle In Content Builder, defines the sweep (angle direction) that the software uses to ensure that the 3D part is built correctly. Path Angle is a default setting that appears as PathA1, PathA2, etc. perspectives 3-dimensional views of a model that apply the principle that objects appear smaller when they are farther away, resulting in a true-to-life representation of the model. Perspective views are generated using the AEC camera commands. phase type The type of electrical power, 1-phase or 3-phase. pigtail A short piece of wire used to extend or connect wires in a junction box. plan view A view of a drawing from above, looking down the Z axis and perpendicular to the XY plane of the current UCS. plenum The area where the ductwork connects to a furnace unit. Often containing the evaporator coil-the main indoor component of the air conditioning system. plumbing fitting A plumbing component, such as an elbow, tee, union, or coupling, for connecting individual pipe segments. pneumatic Operated by air or by the pressure of air. pressure A type of stress that is exerted uniformly in all directions; its measure is the force exerted per unit area. pressure drop The pressure drop displays the loss of pressure between the limiting fixture and the source. pressure-reduction valve Used at the point where water comes into the house, in order to eliminate or reduce the pressure that causes water hammer. primitive A limited version of a part model that is designed for repeated use in part creation. A primitive can represent a basic shape, such as a box, or a connection on a part, such as a flanged pipe connector. prompt A message on the command line that asks for information or requests an action by the user. quick select A sorting filter used to separate selected objects by property (such as layer) or by object type. quick slice A plane generated from 2 selected points and an entity used to slice through an AEC object. The resulting profile becomes a polyline that is added to the current layer. See also slice. raceway A routing system used to run electrical wires around a building. radius of curvature The radius of a bend. reducer A fitting that connects different size segments together. regenerate (2) To step through a part catalog structure and validate all parts. regenerate (regen) (1) To update the screen display of a drawing by recomputing the screen coordinates from the database. register An assembly of parts, typically a grille and damper, that covers an air opening or end of an air duct. representation sets See display representation set. return air Air drawn into an air handling unit after having been circulated through an air system, such as a heating or cooling system. return duct The duct run through which air is drawn after having been circulated through a building or room. Glossary | 815