CDT CAD Software & Technology Applications 3

Question 1

What is the purpose of a 'block' in CAD drafting?

Accepted Answer

A named reusable symbol or group of objects inserted as a single unit

Answer

A block is a named collection of objects combined into a single unit that can be inserted multiple times, scaled, rotated, and updated globally throughout a drawing.

Question 2

In parametric CAD modeling, what is a 'constraint'?

Accepted Answer

A rule that controls the geometric relationship or dimension of sketch elements

Answer

Constraints in parametric modeling are rules applied to geometry that define relationships (geometric constraints) or sizes (dimensional constraints), allowing the model to update when parameters change.

Question 3

Which plotting setting in CAD determines how drawing colors translate to printed line weights?

Accepted Answer

CTB or STB (plot style table)

Answer

Plot style tables (CTB for color-dependent, STB for named styles) map drawing colors or object styles to specific lineweights, colors, and screening values on the printed output.

Question 4

What distinguishes a '2.5D' CAD drawing from a true 3D model?

Accepted Answer

It represents objects with extruded flat shapes without full volumetric geometry

Answer

2.5D drawings add height (Z-axis extrusion) to flat 2D shapes but lack true 3D geometry like curved surfaces or compound angles, making them simpler than full solid models.

Question 5

In CAD, what is the primary purpose of using 'paper space' versus 'model space'?

Accepted Answer

Model space is for drawing at full scale; paper space is for composing multi-view layouts for plotting

Answer

Model space is where geometry is drawn at full real-world scale, while paper space is used to arrange viewports, add title blocks, and set up the drawing sheet for printing.

(CDT) Certified Drafting Technician Practice Test

(CDT) Certified Drafting Technician Practice Test

CDT CAD Software & Technology Applications 3