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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 piston and a cylinder machine obtains a fluid system, which passes through a complete cycle of four processes. In the mean while a cycle the sum of all heat transfer is 150KJ and
define spring stiffness
DEFINATION
Classification Based on Type of Welding Fusion welding : These processes involve fusion of the base metal to complete the weld. Fusion welds generally do not require thea
Numerical Problems Based on the Cantilever Beam: Draw the SF and BM diagram for the beam as shown in the figure given below. Also indicate principal values on diagrams.
Rails: Rails are the part of the Permanent Way on which the wheels of the train travel. The rails also maintain the gauge separation. Rails have to possess the following d
Drill Bit: This is a drilling tool used in drilling machines. The application of this tool is to make holes. Figure shows drill bit. Figure: Drill Bit
Find out the intensity of the external pressure: A thick cylinder of 0.5 m external diameter & 0.4 m internal diameter is subjected simultaneously to internal & external press
Q. W rite down the basic formula for maximum bending moment in some ideal cases. Sol.: Ber m together with nature of load Maximu
please explain more about polygon of forces lab such as observation, theory and others.
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