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Engineering Materials

Engineering Materials
The lower critical point for all steels is

600°C
700°C
913°C
723°C

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Engineering Materials
Body centered cubic space lattice is found in

Zinc, magnesium, cobalt, cadmium, antimony and bismuth
Alpha iron, tungsten, chromium and molybdenum
Gamma iron, aluminium, copper, lead, silver and nickel
None of these

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Engineering Materials
Silicon when added to copper improves

Machinability
Hardness and strength
Strength and ductility
Hardness

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Engineering Materials
The tensile strength of wrought iron is maximum

Perpendicular to lines of slag distribution
Along the lines of slag distribution
None of these
Uniform in all directions

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Engineering Materials
The usual composition of a soldering alloy is

Tin, lead and small percentage of antimony
Tin and copper
Tin, lead and silver
Tin and lead

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Engineering Materials
Aluminium bronze contains aluminium and copper in the ratio of

2.1180555555556
0.47916666666667
40 : 60
2.5277777777778

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