CAD CAD Specialist Civil and Infrastructure Design

Question 1

Which AutoCAD Civil 3D object type is used to model the horizontal and vertical geometry of a road centerline?

Accepted Answer

Alignment

Answer

An Alignment in Civil 3D defines the horizontal geometry of a road or route centerline.

Question 2

In Civil 3D, what term describes the cross-sectional shape applied repeatedly along an alignment to generate a 3D road model?

Accepted Answer

Assembly

Answer

An Assembly is the full cross-section template (made of subassemblies) that is repeated along an alignment to build a corridor.

Question 3

What is the primary purpose of a grading group in AutoCAD Civil 3D?

Accepted Answer

To model site grading and earthwork volumes

Answer

Grading groups are used in Civil 3D to design site grading and calculate cut/fill earthwork volumes.

Question 4

Which coordinate system is most commonly specified in US civil engineering CAD projects for georeferencing drawings?

Accepted Answer

State Plane Coordinate System (SPCS)

Answer

The State Plane Coordinate System is the standard used in US civil engineering projects for local georeferencing accuracy.

Question 5

In a stormwater drainage design drawn in CAD, what term refers to the lowest point in a pipe or channel cross-section?

Accepted Answer

Invert

Answer

The invert elevation is the elevation at the lowest interior point of a pipe or drainage structure.

(CAD) Certified Computer-Aided Design Specialist Practice Test