CDT Materials & Equipment Knowledge 3

Question 1

What does the term 'tooth' refer to when describing a drafting surface?

Accepted Answer

The slight texture that helps pencil graphite adhere to the surface

Answer

Tooth refers to the microscopic texture of a drawing surface that mechanically grips graphite particles, affecting how well pencil marks adhere and how they erase.

Question 2

Which instrument is used to transfer a measurement from one location on a drawing to another without reading the numeric value?

Accepted Answer

Dividers

Answer

Dividers have two sharp points and are used to transfer distances directly between two locations without referencing a numeric measurement.

Question 3

In CAD drafting, what is the equivalent of a physical template used in manual drafting?

Accepted Answer

Block or symbol library

Answer

CAD blocks or symbol libraries serve the same purpose as physical templates — they provide pre-drawn standard symbols that can be inserted repeatedly.

Question 4

Which paper weight (in lb bond) is most commonly used for standard engineering drawing sheets?

Accepted Answer

20 lb

Answer

20 lb bond paper is the standard weight for most engineering drawings, providing adequate durability without being unnecessarily heavy for reproduction.

Question 5

A flexible curve (french curve substitute) is best suited for drawing:

Accepted Answer

Irregular curves that do not follow a fixed geometric formula

Answer

Flexible curves can be bent to match any irregular curve shape, making them ideal for drawing non-geometric curves such as topographic contours or streamlined profiles.

(CDT) Certified Drafting Technician Practice Test

(CDT) Certified Drafting Technician Practice Test

CDT Materials & Equipment Knowledge 3