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Engineering Materials

Engineering Materials
Which of the following material has maximum ductility?

Copper
Nickel
Mild steel
Aluminium

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Engineering Materials
Preheating is essential in welding

All of these
All nonferrous materials
High speed steel
Cast iron

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Engineering Materials
The property of a material due to which it breaks with little permanent distortion, is called

Plasticity
Malleability
Brittleness
Ductility

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Engineering Materials
Perminvar alloy having constant permeability is an alloy of

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

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Engineering Materials
The main alloying elements high speed steel in order of increasing proportion are

Tungsten, chromium, titanium
Tungsten, titanium, vanadium
Vanadium, chromium, tungsten
Chromium, titanium, vanadium

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Engineering Materials
Cementite consist of

6.67% carbon and 93.33% iron
13% carbon and 87% ferrite
13% cementite and 87% ferrite
13% ferrite and 87% cementite

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