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Materials and Construction

Materials and Construction
Silicone rubber is not resistant to the corrosive action of

Both B and C
Ether
Sulphuric acid (95%)
Sulphuric acid (10%)

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Materials and Construction
Purity of electrical grade aluminium should be ≥ __________ percent.

95
85
99.5
90

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Materials and Construction
Aluminium as a material of construction suffers from the disadvantage of

Rather low tensile strength
Very low strength to weight ratio
Scarce availability
Very high cost

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Materials and Construction
Vessels made of __________ can be used to store dry chlorine.

Steel or iron
None of these
Nickel
Thermoplastic materials

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Materials and Construction
Cast iron and steel pipes are produced by __________ casting.

Die
Slush
True centrifugal
Investment

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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.

Antimony
Bismuth
Arsenic
Oxygen

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