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Engineering Materials

Engineering Materials
Steel made from phosphate iron is

Brittle
Hard
Tough
Ductile

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Engineering Materials
Which of the following material has nearly zero coefficient of expansion?

High speed steel
Invar
Stainless steel
Heat resisting steel

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Engineering Materials
The bond formed by transferring electrons from one atom to another is called

Covalent bond
Ionic bond
None of these
Metallic bond

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Engineering Materials
The transistor is made of

Copper
Germanium
Silver
Gold

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Engineering Materials
Bronze contains

70% copper and 30% zinc
90% copper and 10% tin
85 - 92% copper and rest tin with little lead and nickel
70 - 75% copper and rest tin

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Engineering Materials
The crystal structure of brass is

Orthorhombic crystalline structure
F.C.C.
H.C.P.
C.C.

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