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Engineering Materials

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

Ionic bond
Metallic bond
Covalent bond
None of these

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Engineering Materials
Gun metal contains

90% copper and 10% tin
85 - 92% copper and rest tin with little lead and nickel
70 - 78% copper and rest tin
70% copper and 30% zinc

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Engineering Materials
The ability of a material to resist softening at high temperature is known as

Creep
Hot tempering
Fatigue
Hot hardness

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Engineering Materials
Eutectoid steel contains following percentage of carbon

0.0063
0.0002
0.003
0.008

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Engineering Materials
Heavy duty leaf and coil springs contain carbon of the following order

0.008
0.005
0.002
0.01

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Engineering Materials
Corrosion resistance of steel is increased by addition of

Sulphur, phosphorus, lead
Vanadium, aluminium
Tungsten, molybdenum, vanadium, chromium
Chromium and nickel

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