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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
PROCEDURE : Visit any lab (physics, chemistry or biology) of your study centre or any other you can get access to and note its features. To guide you through we have listed below
What are the different types of point defects (i) Vacancies (ii) Interstitialcies Compositional defect (iii) Substitutional impurity (iv) Electronic defects
MECHANICAL design for evaporator
Advantages of cold working (i) No heat is needed. (ii) Better surface finish is get. (iii) Superior dimension control. (iv) Improved strength and hardness properti
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ACTIVITY 1 to classify hazardous chemicals based on the information given on the labels Requirements Bottles containing chemicals (generally used in a lab) = 20 in number.
What is wrong with each of the following attempts to write an electron configuration? Justify your answer with suitable explanation. (a) 1s22s3 (b) 1s22s22p23s2 (c) 1s22s23s2 (d) 1
Explain the various steps required in the fabrication of an integrated circuit. Lithography: The method for pattern definition by applying thin uniform layer of viscous liqui
What is migration current in polarography?
Before it can be fed to the gasification reactor, coal must be ground to meet specifications on particle size. The grinding is accompanied by the generation of coal dust that can r
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