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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.
What are the problem arise in pile foundation Problems can also arise in providing pile foundations in residual soils which are underlain by sloping rock. Special rock sockets
Nominal Stress and True Stress: Nominal stress is the ratio of force per initial cross sectional area (original area of cross section). Nominal stress = Force / initial ar
limitations of euler''s theory
How CAD system communicate with control system The concept of a universal data exchange system is depicted in figure. In this figure, it is shown how various CAD systems commun
Space Time Structure If the position of the particle P changes, the differential change in its position vector r is, in general, given by, d r = d x i + d y j + d z k
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
what are the different method for worm gear optimization
Q. Why we need additives explain? Additives are the materials added in small quantities to the moulding sand in order to enhance its exiting properties and to impart to it spec
Q. Heat exchangers for plant design? All exchangers shall be arranged to be readily dismantled for cleaning and maintenance. Cooling and heating streams generally flow against
Initial difference in radii at the junction of a compound cylinder
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