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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.
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Difference between path function and point function
Elastic Limit: Sol. : When external force acts on the body, the body tends to undergo some deformation. If external force is removed and body comes back to its original shap
Find out change in diameter: A cylindrical shell, 0.8 m in a diameter and 3 m long is along with 10 mm wall thickness. If the shell is subjected into an internal pressure of 2
Objectives After studying this unit, you should be able to weigh the merits and demerits of becoming an entrepreneur, discuss the opportunities and financial assis
Q. External coatings on vessels? All pressure vessels that will be installed underground shall have an external coating applied according to the following procedure: • All e
An airfoil of surface area 1.5 ft2 is tested for lift L in a wind tunnel. At an angle of attack of 7° with standard air of density 0.0024 slugs/ft3 at a speed of 90 ft/sec, the lif
INTRODUCTION TO WELDING PROCESSES Welding is a material joining process used in making welds and a weld is a localised coalescence of metals or non metals produced either by he
how to draw circuits using cascade
Incompletely Constrained Motion: While a connection among the elements, building a pair is such that the constrained motion is not done by itself, but by some other means. Such a
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