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Chemical Engineering - Materials and Construction

Exercise : Materials and Construction - Section 6
36.
Silicon percentage in iron castings to have maximum hardness should be about
0.3
0.5
0.8
2.5
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Nickel as a material of construction
is used as an alloying element for both ferrous & non-ferrous alloys.
is paramagnetic below 415° C (its Curie temperature).
dimagnetic.
has a body centred cubic (bcc) crystal lattice structure.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
__________ moulding process can not be used for thermoplastic plastics.
Compression
Extrusion
Injection
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Which of the following crystal structures characterises the ferritic stainless steel ?
Face centred cubic
Body centred cubic
Simple hexagonal
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
'Semi steel' is
produced by adding 10-20% steel to the cupola charge.
stronger than cast iron.
both (a) and (b).
neither (a) nor (b).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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