Materials and Construction Ferric stainless steels compared to austenitic stainless steels Have lower corrosion resistance Are harder to fabricate Are less ductile and hence less suitable for cold pressing All of these Have lower corrosion resistance Are harder to fabricate Are less ductile and hence less suitable for cold pressing All of these ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Ceramic materials Never exhibit polymorphism Are exemplified by clay and mica All of these Are poor electrical conductors due to lack of free electrons Never exhibit polymorphism Are exemplified by clay and mica All of these Are poor electrical conductors due to lack of free electrons ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Babbit metal used for making bearings should have Low co-efficient of friction between journal and bearing Both B & C Ability to retain lubricant on its surface High-co-efficient of friction between journal and bearing Low co-efficient of friction between journal and bearing Both B & C Ability to retain lubricant on its surface High-co-efficient of friction between journal and bearing ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction A magnetic material becomes __________ above the Curie temperature. Paramagnetic Diamagnetic Ferromagnetic None of these Paramagnetic Diamagnetic Ferromagnetic None of these 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%)? Induction motors High frequency transformers Armature of small motors/generators Generators and small motors Induction motors High frequency transformers Armature of small motors/generators Generators and small motors ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction The main constituent of carborundum is __________ carbide. Boron Aluminium Silicon Calcium Boron Aluminium Silicon Calcium ANSWER DOWNLOAD EXAMIANS APP
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