Exercise: Engineering Materials

Questions for: Engineering Materials

During the operation of a bessemer converter, the white flame indicates that the silicon and managenese had burnt and carbon has started oxidising.
A:
Agree
B:
Disagree
C:
D:
Answer: A
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The limestone in the charge of a blast furnace decomposes to give lime and carbon dioxide. The lime thus obtained
A:
controls the grade of pig iron
B:
acts as an iron-bearing mineral
C:
supplies heat to reduce ore and melt the iron
D:
forms a slag by combining with impurities
Answer: D
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Vanadium when added to steel
A:
increases tensile strength
B:
decreases tensile strength
C:
raises critical temperature
D:
Sowers critical temperature
Answer: A
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18/8 stainless steel consists of
A:
18% nickel and 8% chromium
B:
18% chromium and 8% nickel
C:
18% nickel and 18% chromium
D:
8% nickel and 8% chromium
Answer: B
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A steel with 0.8% carbon and 100% pearlite is called
A:
eutectoid steel
B:
hypo-eutectoid steel
C:
hyper-eutectoid steel
D:
none of these
Answer: A
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