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Engineering Materials

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

Concrete
Vitrified clay
Asbestos cement
Cast iron

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Engineering Materials
Gamma-iron occurs between the temperature ranges of

900°C to 1400°C
1400°C to 1530°C
400°C to 600°C
600°C to 900°C

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Engineering Materials
Induction hardening is the process of

Inducing hardness by continuous process
Heating and cooling rapidly
Hardening surface of work-piece to obtain hard and wear resistant surface
Increasing hardness throughout

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Engineering Materials
Perminvar alloy having constant permeability is an alloy of

Nickel, copper and iron
Copper, nickel and antimony
Iron, zinc and bismuth
Nickel, copper and zinc

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Engineering Materials
Sulphur in cast iron

Aids fusibility and fluidity
Makes the iron soft and easily machinable
Increases hardness and brittleness
Make the iron white and hard

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Engineering Materials
Nodular cast iron is produced by adding ________ to the molten cast iron.

Chromium
Nickel
Magnesium
Copper

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