EMAE 160 METALS EXAM QUESTIONS
AND ANSWERS
What are the differences between an electric arc and a basic oxygen furnace? -
ANSWER-electric arc - produce steel mostly from scrap collected for recycling
oxygen furnace - turns iron, with some additions of scrap, into steel
List the four basic ingredients to make steel in a basic oxygen furnace (BOF). -
ANSWER-1) Pig iron
2) steel scrap
3) Limestone
4) Oxygen
Explain the designation: 1018CRS. - ANSWER-10 - plain carbon steel 18 - .18%
carbon content CRS - cold rolled low carbon steel
What are the three types of Cast Iron? Which is the most common? - ANSWER-1)
Gray - most common
2) Ductile
3) White
What are the differences between ferrous and non-ferrous materials? - ANSWER-
ferrous - contain iron, easier to recycle
non-ferrous - no iron, more resistant to corrosion
Why is a controlled atmosphere box furnace used for heat treating? - ANSWER-
control carbon content
What is tempering? - ANSWER-improve the hardness and elasticity of metal by
heating it to a high temp.
Is it possible to heat treat/harden through low-carbon steels? Why or why not? -
ANSWER-No, low carbon steel has very low hardenability
True or false: The strength and hardness of steel increase as carbon content
increases. - ANSWER-True
List five products produced on a rolling mill. - ANSWER-1) Sheet stock
2) I-Beam
3) U-Beam
4) rails
5) round stock
What element is the most important alloying ingredient in steel? - ANSWER-Carbon
AND ANSWERS
What are the differences between an electric arc and a basic oxygen furnace? -
ANSWER-electric arc - produce steel mostly from scrap collected for recycling
oxygen furnace - turns iron, with some additions of scrap, into steel
List the four basic ingredients to make steel in a basic oxygen furnace (BOF). -
ANSWER-1) Pig iron
2) steel scrap
3) Limestone
4) Oxygen
Explain the designation: 1018CRS. - ANSWER-10 - plain carbon steel 18 - .18%
carbon content CRS - cold rolled low carbon steel
What are the three types of Cast Iron? Which is the most common? - ANSWER-1)
Gray - most common
2) Ductile
3) White
What are the differences between ferrous and non-ferrous materials? - ANSWER-
ferrous - contain iron, easier to recycle
non-ferrous - no iron, more resistant to corrosion
Why is a controlled atmosphere box furnace used for heat treating? - ANSWER-
control carbon content
What is tempering? - ANSWER-improve the hardness and elasticity of metal by
heating it to a high temp.
Is it possible to heat treat/harden through low-carbon steels? Why or why not? -
ANSWER-No, low carbon steel has very low hardenability
True or false: The strength and hardness of steel increase as carbon content
increases. - ANSWER-True
List five products produced on a rolling mill. - ANSWER-1) Sheet stock
2) I-Beam
3) U-Beam
4) rails
5) round stock
What element is the most important alloying ingredient in steel? - ANSWER-Carbon
