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Materials and Construction

Materials and Construction
Pick the odd man out of the following.

Pack carburising
Calorising
Nitriding
Cyaniding

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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%?

Nickel
Karbate
Cast iron
Steel

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Materials and Construction
Which of the following has the poorest wel-dability?

Mild steel
Wrought iron
Low carbon steel
High-carbon steel

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Materials and Construction
Tin vessels are corroded by

Synthetic detergent solution
Anhydrous ammonia
None of these
Aromatic solvents

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Materials and Construction
Chilled iron castings are

None of these
Easily machinable
Highly wear resistant
Soft on surface

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Materials and Construction
Galvanising (i.e., zinc coating) of steel sheets is done to

Prevent its rusting by contact with corrosive atmosphere
Neither A nor B
Both A & B
Protect the base metal by cathodic protection

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