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Engineering Materials

Engineering Materials
Crystal structure of a material is, generally, examined by

Optical microscope
Naked eye
X-ray techniques
Metallurgical microscope

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Engineering Materials
For the allotropic forms of iron, the points of arrest are

The points where no further change occurs
Constant for all metals
The points of discontinuity
The points where there is no further flow of metal

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Engineering Materials
Dye penetrant method is generally used to locate

Superficial defects
Surface defects
Core defects
Temporary defects

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Engineering Materials
Shock resistance of steel is increased by adding

Nickel
Nickel and chromium
Sulphur, lead and phosphorus
Chromium

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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
A small percentage of boron is added to steel in order to

Increase hardenability
Increase wear resistance
Increase endurance strength
Reduce machinability

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