A) rubidium B) aluminium oxide C) pure copper D) silica. Ans : (D)
A) purifying it B) reducing carbon percentage C) alloying with cobalt D) increasing carbon percentage. Ans : (C)
A) electrolytic refining B) induction heating C) casting D) rolling. Ans : (A)
A) mixture of barium oxide-strontium oxide B) tungsten C) thoriated tungsten D) any of the above. Ans : (D)
A) 0.44 B) 0.54 C) 0.66 D) 0.74. Ans : (D)
A) thallic sulphide B) cadmium sulphide C) selenium D) any of the above. Ans : (D)
A) the angle between the two closest directional bonds of an atom B) a covalent bond between two atoms C) the number of atoms (or ions) surrounding and touching a central atom D) none of the above. Ans : (C)
A) radars B) illumination C) remote sensing D) all of the above. Ans : (B)
A) reduce cost B) improve resistivity C) increase mechanical strength D) none of the above. Ans : (C)
A) Pure iron B) 4% silicon C) Grain oriented Si-Fe. Ans : (C)