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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.
Explain Wilson HArtnell Governor
The overall size of the crane must not be changed. The height and reach of the loading point is to remain the same . Original parts must remain and you are allowed additions such
when correction couple should be applied?
Ease of Operation : For higher power transmissions, the operation of disengaging the clutch must not be tiresome to the driver.
Ceramics Ceramics are mostly inorganic crystalline materials characterized by high melting point and low ductility. Such materials are processed via methods other than melting
Corner joint- The flush corner joint is designed primarily for welding sheet metal that is 12 gauge or thinner. It is restricted to lighter materials. The half-open corner join
(a) Derive the mathematical expression for Steady Flow Energy Equation. State the assumption made before the derivation. (b) The internal energy of a substance is provided by th
Fluid Friction: Fluid friction manifests when the lubricating fluid is introduced between contact surfaces of the two bodies. If thickness of lubricant or oil between the m
What is the sequence of this problem Job- 1 2 3 4 5 6 7 M/c M1 4 13 16 7 11 12 10 M2 9 11 11 7 13 2 4
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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