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Materials and Construction

Materials and Construction
Constantan is an alloy of

Cu (55%) & Ni (45%)
Fe (80%) & Ni (20%)
Cu (55%) & Sn (45%)
Pt (95%) & Rh (10%)

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Materials and Construction
Which of the following crystal structures characterises the austenitic stainless steel?

Simple hexagonal
Face centred cubic
Body centred cubic
None of these

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Materials and Construction
Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously.

Bismuth
Arsenic
Both B and C
Antimony

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Materials and Construction
Cementite is

Characterised by an orthorhombic crystal structure
All of these
A compound of carbon and iron
Fe₃C chemically

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Materials and Construction
Carbon supply in pack carburising process is in the form of

Charcoal
Hydrocarbon oil
Graphite
Calcium carbide

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Materials and Construction
__________ does not contain copper as an alloying element,

Monel metal
Perminivar
Manganin
Nichrome

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