Materials and Construction A chemical change takes place when iron None of these Rusts Is heated Melts None of these Rusts Is heated Melts ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Duriron is Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion All of these High silicon iron Acid resistant, brittle and very hard Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion All of these High silicon iron Acid resistant, brittle and very hard ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Containers made of high silicon cast iron (14% Si) are not suitable for the storage of Benzoic & boric acids Hydrochloric acid (concentrated) Phosphoric acid (95%) & sulphuric acid (95%) Acetic acid Benzoic & boric acids Hydrochloric acid (concentrated) Phosphoric acid (95%) & sulphuric acid (95%) Acetic acid ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction The main purpose of galvanising iron sheets is to Increase its glossiness and lustre Prevent the action of water Prevent the action of oxygen Harden the surface Increase its glossiness and lustre Prevent the action of water Prevent the action of oxygen Harden the surface ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Which one occupies the lowermost position in the electromotive series of metals? Alkali metals (K, Na, Li) Noble metals (Ag, Pt, Au) Zinc Aluminium Alkali metals (K, Na, Li) Noble metals (Ag, Pt, Au) Zinc Aluminium ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Carbon is present in steel wholly in the Neither A nor B Both A & B Combined form Free state as graphite Neither A nor B Both A & B Combined form Free state as graphite ANSWER DOWNLOAD EXAMIANS APP
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