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Engineering Materials

Engineering Materials
Which of the following is an amorphous material?

Silver
Lead
Mica
Glass

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Engineering Materials
When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.

Free graphite
Cementite
Both A and B
None of these

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Engineering Materials
Foundry crucible is made of

Lead
German silver
Mild steel
Graphite

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Engineering Materials
The heat treatment process used for softening hardened steel is

Carburising
Normalizing
Annealing
Tempering

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Engineering Materials
Sulphur in cast iron

Increases hardness and brittleness
Makes the iron soft and easily machinable
Aids fusibility and fluidity
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
Magnesium
Nickel
Copper

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