Materials and Construction Which one occupies the lowermost position in the electromotive series of metals? Aluminium Noble metals (Ag, Pt, Au) Zinc Alkali metals (K, Na, Li) Aluminium Noble metals (Ag, Pt, Au) Zinc Alkali metals (K, Na, Li) 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 Generators and small motors High frequency transformers Armature of small motors/generators Induction motors Generators and small motors High frequency transformers Armature of small motors/generators ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Most common stainless steel type 316, which is highly resistant to corrosion contains 2-4% Cr, 22% NI and 2-4% Mo 20-22% Cr, and 8-10% Ni None of these 16-13% Cr 10-14% Ni and 2-3% Mo 2-4% Cr, 22% NI and 2-4% Mo 20-22% Cr, and 8-10% Ni None of these 16-13% Cr 10-14% Ni and 2-3% Mo ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines? Chromium steel Silicon steel Molybdenum steel None of these Chromium steel Silicon steel Molybdenum steel None of these ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction A chemical change takes place when iron Rusts Melts Is heated None of these Rusts Melts Is heated None of these ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property? Sulphur Silicon Phosphorus None of these Sulphur Silicon Phosphorus None of these ANSWER DOWNLOAD EXAMIANS APP
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