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Materials and Construction

Materials and Construction
Softening of hardned steel is done by its

Annealing
Tempering
Carburising
Normalising

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Materials and Construction
The heat treatment process applied to cold formed steel parts is

Artificial ageing
Solution annealing
Normalising
Tempering

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Materials and Construction
Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70%?

Cast iron
Steel
Nickel
Karbate

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Materials and Construction
The presence of impurities in iron

Increases its melting point
Makes it malleable
Decreases its melting point
Does not affect its melting point

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Materials and Construction
Tin vessels are corroded by

Aromatic solvents
Synthetic detergent solution
None of these
Anhydrous ammonia

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Materials and Construction
Cast iron has

Very high tensile strenth
High malleability
Elastic limit close to ultimate breaking strength
High ductility

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