CD CD Drafter Materials & Manufacturing Processes

Question 1

Which material property describes a metal's ability to be drawn into a wire without breaking?

Accepted Answer

Ductility

Answer

Brittleness

Answer

Hardness

Answer

Elasticity

Question 2

On a technical drawing, a surface finish symbol with a value of 125 µin Ra indicates:

Accepted Answer

A relatively smooth machined surface

Answer

A polished mirror surface

Answer

A rough as-cast surface

Answer

A ground surface

Question 3

Which manufacturing process uses a rotating cutting tool to remove material from a stationary workpiece?

Accepted Answer

Milling

Answer

Turning

Answer

Drilling

Answer

Grinding

Question 4

What does the abbreviation 'HR' indicate when specified next to a material designation on a drawing?

Accepted Answer

Hot Rolled

Answer

High Resistance

Answer

Heat Resistant

Answer

Hard Rolled

Question 5

A casting process that forces molten metal into a reusable steel mold under high pressure is called:

Accepted Answer

Die casting

Answer

Sand casting

Answer

Investment casting

Answer

Centrifugal casting

Question 6

Which heat treatment process hardens only the outer surface of a steel part while keeping the core tough?

Accepted Answer

Case hardening

Answer

Annealing

Answer

Normalizing

Answer

Tempering