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Chemical Engineering - Materials and Construction

Exercise : Materials and Construction - Section 6
21.
Corrosion resisting properties of cast iron are significantly improved by the addition of 12 - 15% of
tungsten
vanadium
silicon
all (a), (b) & (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Pick out the wrong statement
Hardening makes the steel more brittle.
High alloy steels contain more than 50% alloying element.
18/8 stainless steel is a magnetic steel.
both (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Duriron is
acid resistant, brittle and very hard.
high silicon iron.
prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Pick out the correct statement.
Stainless steel is nothing but chromium coated steel.
Hardening of a soft metal can be done by alloying it with another metal or non-metal.
Plastic deformation of a material is its temporary distortion under the action of applied stress.
Rusting of iron is not electrochemical in nature.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Cast iron detachable joint is used in __________ pipes.
steel
cast iron
asbestos cement
reinforced cement concrete
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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