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Materials and Construction

Materials and Construction
'Age hardening' of duralumin is due to

Copper
Both A & B
Magnesium
Neither A nor B

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Materials and Construction
Anodic material used for the cathodic protection of underground buried steel pipeline is

Zinc or magnesium
Nickel or copper
Bronze
Brass

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Materials and Construction
Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with

Karbate
Lead or acid-proof bricks
Rubber
Acidic refractory

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

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

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Materials and Construction
Dielectric strength of a material is

Its capacity to resist the flow of current
Its capacity to withstand high voltage
Its energy stroage capacity
A magnetic property

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Materials and Construction
For storing water and acid free benzol, use a __________ vessel.

Stainless steel
Steel
Karbate
None of these

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