Which of the following is not a property of a crucible?(a) Retention of thermal conductivity(b) Resistance to chemical attack(c) Retention of electrical conductivity(d) Resistance to erosionI have been asked this question in class test.This key question is from Crucibles topic in chapter Metal Furnace and Practice of Casting-Forming-Welding II

Which of the following is not a property of a crucible?(a) Retention o

1.	Which of the following is not a property of a crucible?(a) Retention of thermal conductivity(b) Resistance to chemical attack(c) Retention of electrical conductivity(d) Resistance to erosionI have been asked this question in class test.This key question is from Crucibles topic in chapter Metal Furnace and Practice of Casting-Forming-Welding II
Answer» The correct option is (C) Retention of ELECTRICAL CONDUCTIVITY For explanation: It is very NECESSARY for the crucible to have retention of THERMAL conductivity, to possess resistance to chemical attacks and to erosion. But, there is no need for retention of electrical conductivity.

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