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Materials and Construction

Materials and Construction
The fermentor used in the production of pencillin (by deep fermentation process) is made of

Glass lined steel
Procelain
Glass
High silicon cast iron

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Materials and Construction
Evaporators used in caustic soda recovery and production plant are made of

Gun metal
Wood metal
Babbit metal
Monel metal

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Materials and Construction
Polymorphism is not exhibited by

None of these
Phosphorous
Carbon
Iron

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Materials and Construction
The electrical conductivity of a __________ decreases with rise in temperature.

Semi-conductor
Dielectric
Metal/alloy
None of these

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Materials and Construction
In cold working of metal as compared to its hot working

Appreciable strain hardening is produced
Yield stress, hardness and fatigue strength is not at all affected
Cracks and blow holes are eliminated
Ductility and impact strength improves

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Materials and Construction
Very high sulphur in pig iron makes

All of these
Its brittle and malleable
Its casting unsound
Its hard and machinable

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