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Engineering Materials

Engineering Materials
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is

Vanadium
Chromium
Nickel
Cobalt

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Engineering Materials
The ability of a material to resist softening at high temperature is known as

Hot tempering
Creep
Hot hardness
Fatigue

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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
Phosphorus
Manganese
Silicon

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Engineering Materials
Addition of silicon to aluminium results in

Improvement of corrosion resistance
Improvement of casting characteristics
Improving machinability
One of the best known age and precipitation hardening systems

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Engineering Materials
Lead is poured into the joint between two pipes. These pipes may be made of

Cast iron
Vitrified clay
Concrete
Asbestos cement

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Engineering Materials
Age hardening is related to

Copper
Silver
Brass
Duralumin

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