Materials and Construction
__________ is used for examining the macro-structure of a material.

Optical microscope
X-rays
Visual inspection by naked eye
Metallurgical microscope

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Materials and Construction
Lead is

Used as a shock absorber (in mattress form) between the foundation an steel framework of skyscrapper buildings
Used as a cathodic material
Not resistant to corrosion
Not used as pigment (in its compound forms) for paints

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