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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.
CO2 Welding CO2 Welding is a variation of GMAW. Here the inert gas is replaced by gas mixtures or carbon dioxide, which are chemically active. The carbon dioxide decomposes in
Illustrate with required expression for dynamically equivalent system. Illustrate in detail about the Balancing of Radial Engines.
Sweep Representations The simplest form of sweep is that produced by sweeping a two-dimensional area along an axis perpendicular to its plane. This form of sweep is most usefu
Q. Design pressure of Vessels? The design pressure shall be as specified on the Vessel Data Sheet. The design pressure for a vessel in vacuum service shall be full vacuum (1
Find velocity of the vehicle: A car having mass 400kg is moving with velocity of 20m/sec. A force of 200N that acts on it for 2 mins. Find velocity of the vehicle: (1) W
Write a literature review on the manufacture and application of metallurgical cokes in Nigeria.
A semi elliptical spring has 10 leaves in all, with the two full length leaves extending 625 mm. It is 62.5 mm wide and is prepared by strips 6 mm thick. Prepare a design of helica
Hi I am new tutor here Pankaj kumar I got the mail for the verification and i regitered now . But how can i get the sample assignment for the further process.
A steel pipe with 50 mm OD is covered with a 6.4 mm asbestos insulation followed by a 25 mm layer of fiber-glass insulation [K = 0.0485 Wmk]. The pipe temperature is 393 K and the
The Dimension Text Edit command is used to modify the text position of any single dimension. The command can be used to position the tex
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