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Q. What do you mean by Thermosetting plastics?
This plastic undergoes a number of chemical changes on heating and cure to infusible and practically insoluble articles. The chemical change is not reversible thermosetting plastics do not soften on reheating and can not be reworked. They rather become harder due to completion of any left-over polymerization reaction. Eventually, at high temperatures, the useful properties of the plastic get destroyed. This is called degradation. The commonest thermosetting plastics are: alkyds, epoxides, polyesters, phenolics and urea.
Tank Drainage A large open vertical tank has three small, smooth, well-rounded orifices spaced equidistantly at ¼ h , ½ h , ¾ h up from the bottom of the tank (Fig. Q1). Water
Dynamic Machine Routing Machine routing identifies the machines that are needed for each of the operation of a given job. Within the JSP or Job Shop Scheduling Problem model,
Internal Parts of boiler: P r essu r e Gauge : For indicating steam pressure W ater Level Indicator : for indicating water level. Steam Stop Valve : Permits fl
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Q. What do you mean by Thermosetting plastics? This plastic undergoes a number of chemical changes on heating and cure to infusible and practically insoluble articles. The chem
Q. Why we use Nickel Alloys in welding? Nickel weld metals have high creep-rupture strength but often have lower stress-rupture ductility and lower mechanical and thermal fatig
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