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Materials and Construction

Materials and Construction
Which of the following is not a nickel based alloy?

Hastelloys
Babbit metal
Nimonics
Inconel

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Materials and Construction
Acetylene gas holder is made of

Monel metal
Cast iron
Steel
Copper

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Materials and Construction
Specify the material of construction suitable for handling concentrated HNO₃ at 100°C.

Stainless steel
Silicone rubber
Tin and wood
High silicon iron, Kel-F and teflon

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Materials and Construction
Containers made of high silicon cast iron (14% Si) are not suitable for the storage of

Acetic acid
Phosphoric acid (95%) & sulphuric acid (95%)
Benzoic & boric acids
Hydrochloric acid (concentrated)

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Materials and Construction
Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines?

Silicon steel
Molybdenum steel
Chromium steel
None of these

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Materials and Construction
Graphite is corroded by

Hydrochloric acid
Sea water
None of these
Sulphuric acid (10%)

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