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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.
What is drilling machine The machine used for drilling is called drilling machine. The drilling operation can also be accomplished in lathe, in which the drill is held in ta
Determine footing moment analysis for given demonstration. Ans: Assuming effective depth as d, Bending moment M at the face of column M = ((273.60 x 2.80 x (1.40 - 0
for an otto cycle, compression ratio=8.5:1,air inlet=15degree celsius and pressure=101.3kpa, maximum cycle temperature= 1800degree celsius, what is temperature after compression,te
Q. Local Stresses? Local stresses in the vessel shell/head/skirt/base rings from the lifting attachments (such as lugs, trunnions, etc.), shall be determined for the imposed lo
What is the difference between a mechanical component and a mechanical part?
Example of Alteration of Position and Reference Line Method: Sketch the projections of a pentagonal prism edge of the base 50 millimeter long and height 90 millimeter, the axi
I have some plastic tube .5 OD .44 ID .5 long I put them in a vise end to end (sealing the inside of the tube) THen using a torque wench crush them to see when they fail. I get rea
EDM Machine under varying Cutting Condition a) All the experiments have been conducted on a Z numerically controlled (NC) oil die- sinking EDM Machine. b) The EDM Machine is
function of helium shielding gas
A vessel is in the shape of a truncated cone having diameter of 1 meter at the top and 2 meter at the bottom and height 2 meter. If it is fully filled with water determine the upwa
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