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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 different of blow hole and pin hole
Resolve a force system in to single force: Resolve a force system in to single force and a couple systems. Also explain the Equivalent force couple system. Or 'A
What is bending stress? The bending moment at section tends to bend or deflect beam and internal stresses resist its bending. The process of bending stops when the cross sectio
Q. Explain Rate Pressure Product? The systolic blood pressure is multiplied by the heart rate to provide the double product or modified fusion time index. On presence of an obs
pq+p+q=0
define drawing
Defrance between entrpy and enthalpy
dynamic balancing machine
A uniform air stream with velocity U = 10m/s flows over a flat plate of length 10 meters in the first meter the boundary layer is laminar but beyond this point boundary layer is fu
Determine the maximum permissible axial load: In an open coiled spring of 10 coils the stresses because of bending and twisting are 120 N/mm 2 and 150 N/mm 2 respectively wh
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