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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.
A rigid bar ABCD is hinged at A and supported by a bronze rod, 2m long, and a steel rod 1m long as shown in figure A load of 80 KN is applied at end B. Determine the stresses in ea
In designing rotating space stations to give for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the neg
Relation between stress and strain: The relation between stress and strain is generally shown by plotting a stress-strain (σ -e) diagram. Stress can be plotted on ordinate (ve
Q. Ventilation process of plant? Due to the possibility of accidental discharges of flammable gas and flashing liquid (e.g. leaks, incorrect valve opening, sampling, etc.); ade
importance of workshop in mechanical
Laser Welding Applications with Low Power For a lap weld joining of AISI 416 stainless steel cap to a AISI 310 stainless steel body, CO 2 Laser with a 575 watts beam out
actual division 2km is shown as 1 cm in a map.construct a clean scale to measure km which can travel a distance upto 30 km.Show measurement of 18 km in the scale
What is the objective of hydrostatic sensor paver machine To eliminate the problem in screw conveyer extension of hydrostatic sensor paver machine as per screed width" The p
Derive the mathematical equation for Overall Heat Transfer-Coefficient through a single wall. Aslo Explain physical significance of thermal diffusivity.
Application of dynamic emf
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