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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
1. Consider the previous heat exchanger. Tune a proportional controller for a) GM = 2; PM = 45 degrees and c) MPH (maximum peak height) occurs at 2 dB (provides a z of ~ 0.4).
Insulating material used in spark plug is porcelain
what is complexometric titration?
Applications of permanent magnets a - Applications based on attraction or repulsion forces b - Applications based on Faraday's induction law c- Application based on Lor
illustrate the formation of scale and sludge in boiler and suggest the methods for their control
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
Bulk density: This is represented by the weight per unit volume of the refractory of (g/cm 3 ). This volume includes the volume of the pores space, therefore, higher the bulk dens
Figure P9.9 shows three reactors linked by pipes. As indicated, the rate of transfer of chemicals through each pipe is equal to a flow rate (Q, with units of cubic meters per secon
A double riveted double cover butt joint is used for connecting plates 1.2 cm thick. The diameter of the rivets is 2.2 cm. The permissible stresses in tension - 100 N/mm2 The per
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