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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.
Find an approximated probability: Sixteen numbers are selected independently and at random from the interval [ 0, 1 ]. Find an approximated probability that the mean of these
Q. Show the scope of materials used in caustic service? This Engineering Practice presents metallic materials of construction commonly used in caustic service. The term 'Caust
Spot welding of different metals-Aluminium and its alloys High currents and shorter welding times are necessary for these materials. Special cleaning of the surface is warrante
Explain the uses of Pier and Well Foundations Well foundations are used to transmit large loads from piers of bridges and other marine structures. These are constructions carr
The press tressed bridge structure would look like as shown below, The following factors influences the decision to select the particular prestressing, 1/Span of br
What is Floating Foundations The settlement of foundations can be reduced if the applied load is compensated by excavation of a basement. This basement may be in the form of
Compressio n Ignition Engines (or C.I. Engine): It works on the basis of dieses cycle. In diesel engines, energy addition occurs at constant pressure but energy rejection at
what is vibration in terms of mechanical term
how to find out hte optimal sequence and determine the minimun total elapsed time associated with a given problem
Prove that the ratio of belt tension is given by the T 1 / T 2 = e μθ Let T1 = Tension in belt on the tight side T2 = Tension in belt on the slack side θ = Angle
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