Materials and Construction Which of the following is the most elastic material? Steel Glass Rubber Plastic Steel Glass Rubber Plastic ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction As the impurities are oxidised, the melting point of iron May increase or decrease ; unpredictable Increases Decreases Remains unchanged May increase or decrease ; unpredictable Increases Decreases Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction An alloy used as thermocouple material comprises of 40% nickel and 60% copper. German silver Chromel Kanthal Constantan German silver Chromel Kanthal Constantan 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%)? High frequency transformers Generators and small motors Induction motors Armature of small motors/generators High frequency transformers Generators and small motors Induction motors Armature of small motors/generators ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Galvanising (i.e., zinc coating) of steel sheets is done to Prevent its rusting by contact with corrosive atmosphere Protect the base metal by cathodic protection Both A & B Neither A nor B Prevent its rusting by contact with corrosive atmosphere Protect the base metal by cathodic protection Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction The range of Mho's scale of hardness is from 1 to 10 0 to 10 1 to 8 1 to 15 1 to 10 0 to 10 1 to 8 1 to 15 ANSWER DOWNLOAD EXAMIANS APP
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