Metal Identification

Which of the following is NOT a property of metals?

• Conducts heat and electricity

• Expands when heated and contracts when cooled

• Has a crystalline atomic structure

• Is always non-magnetic

True or False: Non-ferrous metals are usually magnetic.

• True

• False

Austenitic stainless steels (300 series) contain high amounts of iron but are _______.

• non-magnetic

• highly magnetic

• brittle

• prone to rust

Which metal type is described as shiny, smooth, with spiral roll marks?

• Cold-Rolled Steel

• Hot-Rolled Steel

• Aluminum

• Lead

Which metal has the lowest density according to the table?

• Magnesium

• Aluminum

• Zinc

• Copper

Which metal has a density of 8.96 g/cm³ and is used in electrical and plumbing applications?

• Copper

• Lead

• Iron

• Aluminum

What is the primary application of lead according to the table?

• Electrical wiring

• Plumbing

• Radiation shielding

• Construction

Match the following metal types with their spark characteristics: Low-Carbon Steel, High-Carbon Steel, Cast Iron

• Bright yellow, long, few bursts

• Short, red/orange bursts near

• Orange/yellow, more branching and bursts

• Bright yellow, long, few bursts

• Short, red/orange bursts near

• Orange/yellow, more branching and bursts

Continuous chips are produced by hard and brittle materials such as cast iron.

• True

• False

In the file hardness test, if a new file bites easily into the steel, what type of steel is it?

• Low carbon

• High carbon

• Alloy steel

• Tool steel