Materials and Construction The presence of impurities in iron Decreases its melting point Makes it malleable Does not affect its melting point Increases its melting point Decreases its melting point Makes it malleable Does not affect its melting point Increases its melting point ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Graphite is corroded by Sea water Hydrochloric acid Sulphuric acid (10%) None of these Sea water Hydrochloric acid Sulphuric acid (10%) None of these ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100°C ? Kel-F and teflon Graphite Stainless steel Monel Kel-F and teflon Graphite Stainless steel Monel 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 Harden the surface Prevent the action of oxygen Increase its glossiness and lustre Prevent the action of water Harden the surface Prevent the action of oxygen ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction The metals occuring at the lower most position in the electromotive series Are very brittle Resist corrosion very strongly Do not resist corrosion Are heat insulators Are very brittle Resist corrosion very strongly Do not resist corrosion Are heat insulators ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Kel-F is a material, which is Having excellent chemical & high temperature resistance (upto 200°C) Having elastomeric properties Chemically known as polychlorotrifluor-oethylene (PTFE) All of these Having excellent chemical & high temperature resistance (upto 200°C) Having elastomeric properties Chemically known as polychlorotrifluor-oethylene (PTFE) All of these ANSWER DOWNLOAD EXAMIANS APP
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