Materials and Construction Presence of high amount of silicon in cast iron Increases the contraction of the metal Reduces its fluidity Suppresses the decomposition of Fe₃ C Increases the formation of graphite Increases the contraction of the metal Reduces its fluidity Suppresses the decomposition of Fe₃ C Increases the formation of graphite ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction 'Age hardening' of duralumin is due to Magnesium Neither A nor B Copper Both A & B Magnesium Neither A nor B Copper Both A & B ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Most suitable material for high pressure vessel operating at 500 atm. and 500° C is 18/8 stainless steel Molybdenum stainless steel Mild steel High silicon iron (14% Si) 18/8 stainless steel Molybdenum stainless steel Mild steel High silicon iron (14% Si) ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysterisis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%)? Armature of small motors/generators High frequency transformers Induction motors Generators and small motors Armature of small motors/generators High frequency transformers Induction motors Generators and small motors ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Carbon tetrachloride can be stored in a storage vessel made of Tin All of these High silicon iron (14% Si) Stainless steel Tin All of these High silicon iron (14% Si) Stainless steel ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction To improve the machinability of steel, it is generally subjected to Normalising Tempering Annealing Spheroidising Normalising Tempering Annealing Spheroidising ANSWER DOWNLOAD EXAMIANS APP
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