CAD Specialist Civil and Infrastructure Design Flashcards
6 cards from real CAD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CAD Specialist Civil and Infrastructure Design flashcards as text
Which AutoCAD Civil 3D object type is used to model the horizontal and vertical geometry of a road centerline?
Answer: Alignment
An Alignment in Civil 3D defines the horizontal geometry of a road or route centerline.
In Civil 3D, what term describes the cross-sectional shape applied repeatedly along an alignment to generate a 3D road model?
Answer: Assembly
An Assembly is the full cross-section template (made of subassemblies) that is repeated along an alignment to build a corridor.
What is the primary purpose of a grading group in AutoCAD Civil 3D?
Answer: To model site grading and earthwork volumes
Grading groups are used in Civil 3D to design site grading and calculate cut/fill earthwork volumes.
Which coordinate system is most commonly specified in US civil engineering CAD projects for georeferencing drawings?
Answer: State Plane Coordinate System (SPCS)
The State Plane Coordinate System is the standard used in US civil engineering projects for local georeferencing accuracy.
In a stormwater drainage design drawn in CAD, what term refers to the lowest point in a pipe or channel cross-section?
Answer: Invert
The invert elevation is the elevation at the lowest interior point of a pipe or drainage structure.
When creating a contour map in Civil 3D, which surface analysis method shows areas of equal elevation?
Answer: Contours
Contours are lines connecting points of equal elevation and are the standard representation of terrain in civil CAD.