CAD Specialist Civil and Infrastructure Design Flashcards

In Civil 3D, what is a 'sample line' used for?

Answer: To cut cross-sections through a corridor or surface at regular intervals

Sample lines are cutting planes placed perpendicular to an alignment used to generate cross-section views of corridors and surfaces.

Which plan view symbol in civil CAD typically indicates a storm drain manhole?

Answer: A concentric circle (target symbol)

Storm drain manholes are conventionally shown in plan view as a concentric circle (target) symbol in civil CAD drawings.

What does 'superelevation' refer to in road design CAD?

Answer: The banking (cross-slope) of a road through a curve to counteract centrifugal force

Superelevation is the transverse slope applied to a road through a horizontal curve to help vehicles safely navigate the turn.

In a civil engineering site plan, what does a dashed line typically represent?

Answer: Proposed underground utilities or hidden elements

Dashed lines in civil site plans conventionally indicate underground utilities, existing structures, or hidden elements below grade.

Which AutoCAD Civil 3D tool is used to calculate the volume of earth moved between an existing surface and a proposed surface?

Answer: Both A and B

Civil 3D provides both the Mass Haul tool and the Earthwork Volume Dashboard to analyze and report cut/fill volumes between surfaces.

What is the purpose of a 'daylight line' in a Civil 3D corridor model?

Answer: It shows where the corridor subgrade meets the existing ground surface

The daylight line in a corridor marks where the proposed graded slope intersects (meets) the existing natural ground surface.