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Materials and Construction

Materials and Construction
__________ alloys have the highest specific strength of all the structural materials out of the following.

Chromium
Titanium
Magnesium
Magnetic steel

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Materials and Construction
Kel-F is a material, which is

Chemically known as polychlorotrifluor-oethylene (PTFE)
Having elastomeric properties
All of these
Having excellent chemical & high temperature resistance (upto 200°C)

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Materials and Construction
All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain

Increases very quickly
Decreases in proportion to stress
Decreases very quickly
Increases in proportion to stress

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Materials and Construction
Which of the following will have the highest melting point?

Mild steel
High carbon steel
Wrought iron
Pig iron

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Materials and Construction
Which of the following is the most elastic material?

Glass
Plastic
Rubber
Steel

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Materials and Construction
Zinc is highly __________ at room temperature.

Malleable
Brittle
Resistant to atmospheric corrosion
Ductile

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