MDSP ELEMENTS SET 7

Which among the following have the same compositions but different atomic structures (microstructures), volumes, electrical resistances, and magnetic properties?

• (a) Delta-iron
• (b) Gamma-iron
• (c) Allotropes
• (d) Cementite

This iron is an FCC arangement of iron atoms, stable between 1674 F and 2541 F (912 C and 1394 C), and non magnetic.

• (a) Delta-iron
• (b) Gamma-iron
• (c) Allotropes
• (d) Cementite

This is an iron alloy with less than 2.0% carbon.

• (a) Steel
• (b) Eutectoid steel
• (c) Hypoeutectoid steel
• (d) Cast Iron

Which of the following is an iron alloy with less than 0.8% carbon, consisting of ferrite and pearlite?

• (a) Steel
• (b) Eutectoid steel
• (c) Hypoeutectoid steel
• (d) Cast Iron

This is an iron alloy with 0.8% carbon, consisting of ferrite and pearlite.

• (a) Steel
• (b) Eutectoid steel
• (c) Hypoeutectoid steel
• (d) Cast Iron

This iron alloy contains more than 2% carbon

• (a) Steel
• (b) Eutectoid steel
• (c) Hypoeutectoid steel
• (d) Cast Iron

This is an alloy with 4.3% carbon

• (a) Steel
• (b) Eutectoid steel
• (c) Hypoeutectoid steel
• (d) Eutectic cast iron

What material, known as carbide or iron carbide, has approximately 6.67% carbon and is the hardest of all forms of iron?

• (a) Cementite
• (b) Eutectoid steel
• (c) Hypoeutectoid steel
• (d) Cast Iron

An interrupted quenching process resulting in an austenite to bainite transition.

• (a) Austempering
• (b) Austenitizing
• (c) Martempering
• (d) Tempering

Quenching after heating above the A3 line (for steel with up to 0.8% carbon) or above the A1 line (for steel with more than 0.8% carbon)

• (a) Austempering
• (b) Austenitizing
• (c) Martempering
• (d) Tempering