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Questions and Answers
Why does iron rust?
Why does iron rust?
- Because it is enriched in processing plants
- Because it is found in clays and rocks
- Because it is too soft for most work
- Due to the impurities it contains (correct)
Which metal gives hardness to iron?
Which metal gives hardness to iron?
- Silicon (correct)
- Sulfur
- Copper
- Aluminum
What happens when there is excess sulfur in iron and steel?
What happens when there is excess sulfur in iron and steel?
- They become magnetic
- They become too soft
- They become brittle (correct)
- They become harder
What does manganese resemble but is not magnetic?
What does manganese resemble but is not magnetic?
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