Materials and Construction Gunmetal and bronze are not corroded by the action of Hydrochloric acid (10%) Wet chlorine Nitric acid (< 25%) Synthetic detergent solution Hydrochloric acid (10%) Wet chlorine Nitric acid (< 25%) Synthetic detergent solution ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Which one occupies the lowermost position in the electromotive series of metals? Zinc Alkali metals (K, Na, Li) Aluminium Noble metals (Ag, Pt, Au) Zinc Alkali metals (K, Na, Li) Aluminium Noble metals (Ag, Pt, Au) ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Super conductors are those substances, which Offer high resistance to current flow Conduct electricity at high temperature Conduct electricity at low temperature Offer no resistance to current flow Offer high resistance to current flow Conduct electricity at high temperature Conduct electricity at low temperature Offer no resistance to current flow ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Ceramic materials are Organic in nature Always bad heat conductors Always amorphous in nature Stronger in compression than in tension Organic in nature Always bad heat conductors Always amorphous in nature Stronger in compression than in tension ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction For spinning viscose rayon, the extrusion spinnerettes are made of Platinum or gold alloys Nickel High carbon steel Aluminium Platinum or gold alloys Nickel High carbon steel Aluminium ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Babbit metal used for making bearings should have Both B & C Low co-efficient of friction between journal and bearing High-co-efficient of friction between journal and bearing Ability to retain lubricant on its surface Both B & C Low co-efficient of friction between journal and bearing High-co-efficient of friction between journal and bearing Ability to retain lubricant on its surface ANSWER DOWNLOAD EXAMIANS APP
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