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MATERIAL ENGINEERING QUESTIONS AND ANSWERS

* The material with lowest resistivity is A) constantan. B) silver. C) manganin. D) nichrome. Answer*: B) silver. * Phenol and Formaldehyde are polymerised to a resultant product known as (A) PVC. (B). teflon. (C) polyester. (D) bakelite Answer*: (D) bakelite * Dielectric materials are (A) Insulating materials. (B) Semiconducting materials. (C) Magnetic materials. (D) Ferroelectric materials. Answer*: (A) Insulating materials. *The property due to which the resistance of some metal or compound vanishes under certainconditions is (A) Semi conductivity. (B) Super conductivity. (C) Curie point. (D) Magnetostriction. Answer*: (B) Super conductivity. * Thermocouples are used for the measurement of (A) temperature. (B) pressure. (C) Couples (D) density. Answer*: (A) temperature.