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Engineering Materials

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

Ionic bond
Covalent bond
Metallic bond
None of these

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Engineering Materials
Which of the following has highest specific strength of all structural materials?

Magnesium alloys
Chromium alloys
Magnetic steel alloys
Titanium alloys

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Engineering Materials
Delta iron occurs at temperature of

Between 910°C and 1400°C
Above melting point
Room temperature
Between 1400°C and 1539°C

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Engineering Materials
According to Indian standard specifications, plain carbon steel designated by 40 C8 means that the carbon content is

0.35 to 0.45%
0.4 to 0.6%
0.6 to 0.8%
0.0004

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Engineering Materials
Which of the following is not the correct method of increasing fatigue limit?

Cold working
Surface decarburisation
Shot peening
Nitriding of surface

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Engineering Materials
Iron-carbon alloys containing 1.7 to 4.3% carbon are known as

Eutectic cast irons
None of these
Hypoeutectic cast irons
Hypereutectic cast irons

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