CDT Materials & Equipment Knowledge 2

Question 1

Which lead grade is most appropriate for lettering on a finished engineering drawing?

Accepted Answer

2H

Answer

2H lead provides clean, dark, consistent lines suitable for lettering without smearing or indenting the paper excessively.

Question 2

What is the primary advantage of using vellum over bond paper for hand drafting?

Accepted Answer

It allows superior erasure and is semi-transparent for reproduction

Answer

Vellum's semi-transparency allows it to be used as an overlay or original for reproduction, and its surface erases more cleanly than bond paper.

Question 3

A drafting machine combines the functions of which two traditional drafting tools?

Accepted Answer

T-square and protractor

Answer

A drafting machine replaces both the T-square (for horizontal reference) and the protractor (for angular measurement) in a single adjustable head.

Question 4

Which type of drafting scale is used primarily for maps and site plans where large areas must be reduced?

Accepted Answer

Engineer's scale

Answer

The engineer's scale uses decimal divisions (1"=10', 20', 30', etc.) making it ideal for civil/site drawings covering large geographic areas.

Question 5

What is the recommended method for cleaning a drawing surface before starting a new drawing?

Accepted Answer

Dust with a dry drafting brush to remove loose particles

Answer

A dry drafting brush removes eraser debris and dust without introducing moisture or oils that could damage the drawing surface or affect pencil adhesion.

(CDT) Certified Drafting Technician Practice Test

(CDT) Certified Drafting Technician Practice Test

CDT Materials & Equipment Knowledge 2