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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
Insulating material used in spark plug is porcelain
Q. Write short notes on cloud and pour point of lubricant. Ans. Cloud and pour point of lubricant: When the temperature is lowered up to a particular point, the oil becomes
A sample of water is found to contain , Temporary Mg hardness = 20mg/L,Calcium Sulphate =20 mg/L. Calculate Temporary and Pemanent hardness in water.
A Ge atom contains Ge atom contains Four valence electrons
Production of Chemicals from Coal Coal has been considered a major component of U.S. energy reserves for a long time, and more recently it has become an important raw material
The degree of freedom when ice water and water vapour coexist in equilibrium is zero
Explain the Fermi energy The Fermi energy generally refers to the energy of the highest get quantum state in a system of fermions at absolute zero temperature.
how will you prepare acetal from methanal?
formule for alcoholic cidity
Whats the lifetime of a bugg?
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