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Materials and Construction

Materials and Construction
Rubber lined pumps can be used to pump

Caustic soda
All of these
Chlorinated brine
Hypochlorous acid

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Materials and Construction
Which of the following has the least carbon percentage?

Low carbon steel
Wrought iron
White cast iron
Mild steel

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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.

None of these
Concentrated H₂SO₄
Acetic acid
Dilute HCI

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Materials and Construction
Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing.

Arsenic
Oxygen
Antimony
Bismuth

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Materials and Construction
Which of the following heat treatment processes is used for softening the hardened material?

Normalising
Annealing
None of these
Tempering

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Materials and Construction
In order to be called steel, an alloy should have iron percentage greater than

80
70
50
90

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