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Materials and Construction

Materials and Construction
Lead lined equipments & vessels are suitable for handling

Nitric acid
Hydrochloric acid (10%)
Sulphuric acid upto 60°C
All of these

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Materials and Construction
Polymorphism is not exhibited by

Carbon
Iron
None of these
Phosphorous

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Materials and Construction
Purity of electrical grade aluminium should be ≥ __________ percent.

85
95
99.5
90

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Materials and Construction
The purpose of nitriding the steel is to

Improve its reliability
Soften its surface
Harden its surface
None of these

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Materials and Construction
The most commonly used resin for making reinforced plastic is

Polypropylene
Polyurathane
Nylon-6
Unsaturated polyester

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Materials and Construction
Cold work tool steel should have

High toughness
All of these
Poor hardenability
High wear resistance

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