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Thermal spelling: The breaking or cracking or peeling off the refractory is known as spelling. A good refractory must show a good resistance to thermal spelling. Thermal spelling can be decreased by minimizing the development of internal stress by:
(1) Using refractory with high porosity, good thermal conductivity and low coefficient of expansion.
(2) Avoiding sudden temperature changes.
(3) Proper furnace design
Internal conditioning method
Hall effect can be used to measure (A) Mobility of semiconductors. (B) Conductivity of semiconductors. (C) Resistivity of semiconductors.
Why some overhanging beams have point of contra flexure?
A gas-phase exothermic reaction is approved out in a multi-tube reactor with the catalyst in 1-inch. Tubes and boiling water in the jacket. The feed temperature and the jacket temp
Entry and exit points You should see them from the point of view of access, convenience and safety. 1. Observations 2. Comments and Suggestions
Explain Ferromagnetic materials Ferromagnetic materials are those with spontaneous magnetic alignment. Ferromagnetism is the property of a material to be powerfully attracted
minimum mass of air required for complete combustionof the HFO
a. Explain the problems of flooding and channeling in packed towertion..
Explain oxidation Oxidation : Oxidation is defined as the interaction among oxygen molecules and all the dissimilar substances they may contact, from metal to living tissue. T
chemistry separate the mixture of sand and naphthalene by sublimation
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