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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.
Determine the maximum bending moment: A 12 m span simply supported beam is carrying a consistently distributed load of 2 kN/m over a length of 6 m from the left end and point
GAS TUNGSTEN ARC WELDING (GTAW) Gas Tungsten Arc Welding (GTAW) is popularly known as Tungsten Inert Gas welding (TIG). In this process, an arc is struck between a non consumab
Q. Corrosion in Boiler? With proper BFW treatment, and maintaining pH within a certain range (9.2 to 9.4) and removing oxygen from the system, a stable passive film will be for
a) State FOUR factors that affect the effectiveness of hydrodynamic lubrication as a means of reducing friction between components. b) Under what conditions would boundary lubri
In a nuclear power plant saturated steam at 30 bar enters a h.p. turbine and expands isentrophically to a pressure at which its quality is 0.841. At this pressure the steam is pass
example of fnsd analysis
Welding Head Submerged arc welding head consists of the wire spool, wire feed system, flux delivery hopper and electrical contact nozzle. The electrode wire is unwound from the s
what is the equation which gives the relationship between the maximum tension in the belt T1 and the centrifugal tension Tc if maximum power transmitted?
write the assumption made in derivetion of shear stress produced in circular shaft subjected to torsion
pre heating of casted material for welding
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