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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.
(a) Explain briefly the functions of the spiral casing guide vanes, and draft tube of a reaction water. (b) A Kaplan turbine developing 3250 KW under a head of 6m has a draft tu
Define the term Engineering Mechanics Sol.: Engineering mechanics is the branch of science, which deals the action of forces on the rigid bodies. Everywhere we feel applicat
Q.What is Metal working processes? Metal working processes are processes used to produce wrought products. These product include angles, channels, I-beams, round, squar
The Leader Command The Leader command can be used to annotate at any point on a drawing. The command sequence below was used to draw the leader shown in the Figure Below.
Alumina-Silica Composite This composite is an especially usual refractory material. Due to easy availability and low cost aluminia-silica composite is extensively utilized in
Explain the Importance of Value engineering Improve your career skills Separate "Symptoms" from "problems" Solve "root cause" problems and capture opportunities
Calculate sif of crack - beam: An edge cracked beam carries crack in its central plane whose lengths is 5 mm. A load of 1000 N is applied opposite to crack so that crack would
Arm of Couple: Explain couple and Arm of couple? Sol.: If the two equal and opposite parallel forces (that is equal and unlike) are acting on a body, they do not have a
Hi. I have made a payment for the above ticket number. Will I get all the workings out too? [email protected]
i need the micro etrusion process,how it is done
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