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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.
Classification Of Welding Processes The classificated depending upon the nature of heat source and its movement resulting in spot, seam or zonal welds; or on the extent of heat
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Safety Benefits - Industrial Safety An industry or a company which follows safety programmes is benefitted in several ways. The benefits are shared among employer and employee
In an orthogonal cutting test with a tool of rake angle 10 degree , the following observations were made. 20 Chip thickness ratio = 0.3 Width of cut = 6mm Uncut chip thicknes
the base of a spring -mass- damper system is subjected to the periodic displacement. determine the response of the mass using the principle of superposition
Modi method
SURFACE MODELING: The process of modeling is built much easier for a mathematical description of an object or at least on a part of the object might be applied. Surfaces might
If Engine Does Not Start in Wet or Damp Weather Causes of Problem Remedy Insulators are not clean and dry Fuel t
(a) What is the use of ball race drive? (b) How should one install the bottom cone race? (c) What is the use of front fork oil seal driver body and its attachment? (d) Wha
Terms related to stream engine: STEA M ENGINE MAIN PARTS: 1 . Frame: It supports the various moving parts. 2 . Cylinder: It forms a chamber in which the
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