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Materials and Construction

Materials and Construction
Urea autoclave is made of

Stainless steel
Cast iron
Refractory blocks
Lead lined steel

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Materials and Construction
Stainless steel is not corroded by

Nitric acid (10%)
Saturated brine
Sulphuric acid (10%)
Hydrochloric acid (10%)

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Materials and Construction
Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)

Are used for leaf and coiled springs
Do not have good resilience properties
Do not require heat treatment for any of its applications
Is tempered at 850°C

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Materials and Construction
The material used in the filament of electric bulbs is

Nichrome
Tungsten
Constantan
German silver

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Materials and Construction
A magnetic material becomes __________ above the Curie temperature.

Ferromagnetic
None of these
Diamagnetic
Paramagnetic

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Materials and Construction
Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its

High corrosion resistance
Low thermal conductivity
High co-efficient of thermal expansion
All of these

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