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Engineering Materials

Engineering Materials
Preheating is essential in welding

High speed steel
Cast iron
All of these
All nonferrous materials

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Engineering Materials
Shock resisting steels should have

Low wear resistance
Toughness
Low hardness
Low tensile strength

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Engineering Materials
In grey cast iron, carbon is present in the form of

Flakes
Free carbon
Cementite
Spheroids

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Engineering Materials
The portion of the blast furnace below its widest cross-section is called

Hearth
Throat
Bosh
Stack

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Engineering Materials
The presence of sulphur in pig iron makes

It easily machinable
It brittle
The casting unsound
It hard

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Engineering Materials
The ratio of the volume occupied by the atoms to the total volume of the unit cell is called

None of these
Space lattice
Coordination number
Atomic packing factor

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