18 Questions
What is the primary advantage of using steel structures over concrete structures for tall buildings and large span bridges?
It has a large strength to weight ratio
What percentage of iron does pig iron contain?
90-95%
What is the primary advantage of factory production in steel structures?
Better quality control, higher reliability and safety
What is the main disadvantage of steel structures that requires special protection?
It is prone to corrosion
What is the primary advantage of steel structures in terms of their ability to withstand severe loadings?
They are ductile and robust
What is the main advantage of dismantling and recycling steel structures?
It reduces the life cycle cost of the structure
What is the primary characteristic of cast iron that makes it ideal for making castings?
Low melting point
What is the difference between pig iron and cast iron?
Pig iron changes its name to cast iron when remelted
What is the primary advantage of wrought iron over cast iron?
Higher resistance to corrosion
What is the primary purpose of the basic oxygen furnace (BOF) in steel production?
Reduce the carbon content in iron
What is the final step in the steel production process?
Secondary forming – heat treatment, coating, etc.
What is the primary difference between a blast furnace and an electric arc furnace (EAF)?
Blast furnace is used for primary steel making, while EAF is used for secondary steel making
What occurs to the microstructure of steel when it is rolled below its recrystallization temperature?
The steel becomes harder and more brittle due to dislocations.
What is the primary purpose of heating steel above its recrystallization temperature?
To create a more uniform grain size and carbon distribution.
Which type of steel is characterized by the addition of 10-20% chromium and other elements, and is often used in outdoor construction?
Stainless steel
What is the result of cold rolling on the steel's properties?
The steel becomes harder and more brittle.
What is the primary difference between carbon steels and alloy steels?
The presence of additional alloying elements in the steel.
What is the purpose of adding alloying elements such as tungsten, molybdenum, and vanadium to carbon steels?
To enhance the steel's heat resistance and general durability.
Test your knowledge on cast iron, a type of iron with high carbon content, its characteristics, and its various applications. Learn about its properties, melting point, and uses in making castings. Discover how it differs from other types of iron and steel.
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