CD CD Drafter Materials & Manufacturing Processes 3

Question 1

A drawing note specifying 'REMOVE ALL BURRS AND SHARP EDGES' applies to which manufacturing concern?

Accepted Answer

Post-machining surface cleanup

Answer

This note directs machinists to deburr all edges after cutting or machining to ensure safety and proper fit.

Question 2

What does 'cold working' do to the mechanical properties of a metal?

Accepted Answer

Increases strength and hardness while decreasing ductility

Answer

Cold working (plastic deformation below recrystallization temperature) introduces dislocations that increase strength and hardness but reduce ductility.

Question 3

Which standard body publishes material specifications such as A108, A36, and A514 for carbon and alloy steels?

Accepted Answer

ASTM International

Answer

ASTM International publishes the widely used A-series specifications for ferrous materials used in manufacturing and construction.

Question 4

What is the purpose of annealing a metal part?

Accepted Answer

To relieve internal stresses and improve ductility

Answer

Annealing heats metal to a controlled temperature and cools it slowly to eliminate internal stresses and restore ductility.

Question 5

Which of the following best describes the extrusion manufacturing process?

Accepted Answer

Forcing material through a shaped die to create a continuous profile

Answer

Extrusion pushes or pulls material through a die opening to produce parts with a constant cross-section along their length.

(CD) Certified Drafter Practice Test

(CD) Certified Drafter Practice Test

CD CD Drafter Materials & Manufacturing Processes 3