Thermochemical Processing & Temperature Voltage Relationship Questions

There are 20 T/F questions in total. I will refund if the correctness is below 95%. Please only bid when you are sure about your answer.

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21) Fourier’s law is used to model heat flow in a material with large Biot’s modulus.
22) Bauxite is the major constituent raw material in high alumina refractory manufacturing.
23) Chromia additions enhance the hot strength of high alumina refractories
24) Fireclay refractories are comprised predominantly of hydrated alumino-silicates
25) The Bayer Process is used for the synthesis of tabular alumina grain for special refractories compositions.
26) Fused silica refractories are typically fabricated by sintering quartz in a Nichrome wire heated furnace.
27) Two color pyrometers eliminate the need for emissivity corrections for graybodies.
28) Thermocouples relate electrical current to temperature.
29) Silica refractories are an excellent choice for processing iron oxide powders at low oxygen partial pressures.
30) High alumina brick contains alumina concentrations up to 46 weight percent.
31) The thermal energy required to raise the temperature of a porous ceramic is greater than the
energy required to heat the same ceramic in a dense form to the same temperature.
32) Radiation shields would be a suitable method for reducing the heat lost from
the process cavity of a hot isostatic press.
33) A radiation shield with an emissivity of 0.2 is more efficient than one with an emissivity of 0.6.
34) Ceramics’ constant volume heat capacity is greater than their constant pressure heat capacity.
35) Hysteresis in the thermal expansion behavior of TiO2 is due to anisotropy.
36) The Debye temperature of MgO is lower than for NaCl.
37) The thermoelectric effect describes the electrically resistive heating of a conducting material.
38) Mullite is 2Al2O3•3SiO2.
39) The dimensionless parameter for “relative time” in unsteady-state heat flow
calculations is dependent on the surface heat transfer characteristics of the material.
40) Thermal diffusivity and thermal conductivity are interchangeable equivalent terms.
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