Materials and Construction Which one occupies the lowermost position in the electromotive series of metals? Aluminium Zinc Alkali metals (K, Na, Li) Noble metals (Ag, Pt, Au) Aluminium Zinc Alkali metals (K, Na, Li) Noble metals (Ag, Pt, Au) ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Gas holder of a gobar (cowdung) gas plant is made of Molybdenum stainless steel Aluminium Mild steel Tin Molybdenum stainless steel Aluminium Mild steel Tin ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Galvanising (i.e., zinc coating) of steel sheets is done to Protect the base metal by cathodic protection Neither A nor B Prevent its rusting by contact with corrosive atmosphere Both A & B Protect the base metal by cathodic protection Neither A nor B Prevent its rusting by contact with corrosive atmosphere Both A & B ANSWER DOWNLOAD EXAMIANS APP
Materials and Construction Babbit metals used for making bearings are Short of antifrictional properties Having homogenous microstructure Yellow metals Tin or lead based alloys Short of antifrictional properties Having homogenous microstructure Yellow metals Tin or lead based alloys 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 Which of the following is not used as the ceramic material in 'cermets'? Silicides Carbides Nitrides Oxides Silicides Carbides Nitrides Oxides ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS