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Materials and Construction

Materials and Construction
Bush bearings are made of

None of these
White metal alloys
Mild steel
Phosphorous bronze

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Materials and Construction
Maximum consumption of zinc is in

Alloying
Electrical industry
Utensil manufacture
Galvanising

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Materials and Construction
In the kraft (sulphate) process for the paper manufacture, the digestor is made of

Stainless steel
Wrought iron
Karbate carbon
Cast iron

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Materials and Construction
Presence of nitrogen in steel

Is desirable
Increases its hardness
Makes it brittle
Increases its strength

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Materials and Construction
Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2.

Dilute HCI
Concentrated H₂SO₄
None of these
Acetic acid

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Materials and Construction
Super conductors are those substances, which

Offer high resistance to current flow
Conduct electricity at low temperature
Conduct electricity at high temperature
Offer no resistance to current flow

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