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Electrical Engineering Materials - Interview Questions and Answers

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26. Constantan contains
A. silver and tin
B. copper and tungsten
C. tungsten and silver
D. copper and nickel
Explanation:
27. _____ is the main constituent of glass
A. Fe203
B. Si02
C. AI2O3
D. B2O3
Explanation:
28. Addition of 0.3 to 4.5% silicon to iron _____ the electrical resistivity of iron.
A. increases
B. decreases
C. does not change
D. increases
Explanation:
29. Total number of crystal systems is
A. 2
B. 4
C. 7
D. 12
Explanation:
30. Which of the following materials does not have covalent bonds ?
A. Organic polymers
B. Silicon
C. Metals
D. Metals
Explanation:
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