Which of the following devices is mainly used for thermal analysis of flux?(a) Thermocouple(b) Thermometer(c) Thermo resister(d) Spiral optical tubeThe question was posed to me in an interview for internship.My question is taken from Foundry Fluxes and Refractories topic in division Foundry Introduction & Materials of Casting-Forming-Welding II

Which of the following devices is mainly used for thermal analysis of

1.	Which of the following devices is mainly used for thermal analysis of flux?(a) Thermocouple(b) Thermometer(c) Thermo resister(d) Spiral optical tubeThe question was posed to me in an interview for internship.My question is taken from Foundry Fluxes and Refractories topic in division Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The correct ANSWER is (a) THERMOCOUPLE The explanation is: The flux is first melted inside a crucible and then a thermocouple is inserted into the molten flux. After the COOLING process of molten flux, the temperature VARIATIONS are recorded with respect to time. The melting nature, the variation in viscosity and the melting RANGE of the molten flux with temperature is recorded.

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