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Engineering Materials

Engineering Materials
Which of the following property is desirable for materials used in tools and machines?

Malleability
Plasticity
Ductility
Elasticity

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Engineering Materials
Body centered cubic space lattice is found in

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

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Engineering Materials
Corrosion resistance of steel is increased by adding

Chromium and nickel
Tungsten and sulphur
Nickel and molybdenum
Aluminium and zinc

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Engineering Materials
Which of the following constituents of steels is softest and least strong?

Ferrite
Austenite
Cementite
Pearlite

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Engineering Materials
Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio

2.1180555555556
2.9375
30 : 70
40 : 60

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Engineering Materials
Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?

Sulphur
Manganese
Silicon
Phosphorus

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