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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.
Q. Describe Natural and Synthetic Sand? Natural sand: A natural sand is the on which is available from natural deposits. Only assistive and water need to be added to it to ma
Level of Safety Organization This level comprises representatives of safety departments working at shop floor level or along with workers. The personnel will in fact implement
How can i change the normal function block parameter[1 1]=>(s+1) to (s-1)?
Determine the Loss of Information During Exchange in IGES Loss of Information During Exchange : Information would inevitably be lost when information is passed between two CAD
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Calculate Drilling Speed and Machining Time Calculate the drilling speed if a 50 mm dia hole of 60 mm depth is to be drilled in a M.S. component. The feed rate is 0.2652 and M
Cast Iron Electrodes There are three types of electrodes for welding of cast ions. a) Monel-cored electrodes (30 % Ni 70 % Cu) b) Fe-Ni (40 % Ni) c) Ni-electrodes (97 E) These
The cylindrical tank with hemispherical ends shown in Fig. have volatile liquid and its vapor. The liquid density is 800 kg/m3, and its vapor density is negligible. The pressure in
Discover the angle of twist - uniformly varying shaft: A uniformly varying shaft of length 2 m is subjected to a torque of 2 kN-m. The diameter at the ends shall be 60 mm and
Q. Explain Rate Pressure Product? The systolic blood pressure is multiplied by the heart rate to provide the double product or modified fusion time index. On presence of an obs
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