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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
What are properties of an ideal electrical insulating material? The properties of an ideal (electrical) insulating material are given below:- (i) Low dielectric court (high
Mixing Salt Solutions You mix 195.0 gallons of a mixture containing 12.00 wt% NaCl (sodium chloride) and 88.00 wt% water (solution density = 1.0837 g/cm 3 ) with a V 2 -gallon
reaction between water and petrol engine exhaust gas(contain n2=71%, co2=21% ,co=1.5%)
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
Explain the mechanism of ferromagnetism Ferromagnetism is the basic mechanism by which certain materials (like iron) form permanent magnets and/or exhibit tough interactions
Why some overhanging beams have point of contra flexure?
Prior preparation for fixing and staining animal tissue and/or plant tissues: Find out what procedure the lab technician follows for preparing fixative (either plant andor animal)
Requirement of potable water
typesofhardness
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