A. hard’
B. soft
C. ductile
D. tough
E. malleable
Sulphur in pig iron tends to make it___________________? Read More »
Engineering Materials A. face-centred cubic lattice
B. body-centred cubic lattice
C. hexagonal close-packed lattice
D. all of the above
E. none of the above
The following types of materials are usually the most ductile__________________? Read More »
Engineering Materials A. cementite
B. free carbon
C. flakes
D. spheroids
E. nodular aggregates of graphite
In malleable iron, carbon is present in the form of___________________? Read More »
Engineering Materials A. cementite
B. free carbon
C. flakes
D. spheroids
E. nodular aggregates of graphite
In grey cast iron, carbon is present in the form of____________________? Read More »
Engineering Materials A. malleability
B. ductility
C. surface finish
D. damg characteristics
E. hardness
The unique property of cast iron is its high ___________________? Read More »
Engineering Materials A. 0.5 to 1%
B. 1 – 2%
C. 2.5 to 4.5%
D. 5 – 7%
E. 7-9%.
A. the points where no further change oc-curs
B. constant for all metals
C. the points where there is no further flow of metal
D. the points of discontinuity
E. the points where major changes take place
For the allotropic forms of iron, the points of arrest are __________________? Read More »
Engineering Materials A. body centred cubic
B. face centred cubic
C. hexagonal close packed
D. cubic structure
E. orthorhombic crystal
The crystal of alpha iron is ____________________? Read More »
Engineering Materials A. molecular change
B. physical change
C. allotropic change
D. solidus change
E. atomic change
A. below 723°C
B. 770 – 910°C
C. 910-1440°C
D. 1400-1539°C
E. above 1539°C
Ferromagnetic alpha iron exists in temperature range of________________? Read More »
Engineering Materials