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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 positive displacement pump is a liquid or gas to move by trapping a fixed amount of fluid or gas and then forcing (displacing) that trapped volume into the discharge pipe. Positi
what is the reason that rails are made in I-section form and not in the form of rectangular section.
an arrangement of the wilson epicyclic gearbox giving four forward and one reverse speed of shaft D for an input speed of shaft E is shown in fig .3.in 1st gear Ii is fixed.in 2 ge
COMMON RULES CONCERNING CORRESPONDING OPTION: Let us consider the DATA DIVISION entries as shown below. Now, let us see which data items will be moved if
define elastomer.explain in details?
Lifting machines: Basic definitions of the lifting machines and some lifting machines have been described. For each of these machines, derivation of the formulae for mechanica
Define universal portable radial drills Drilling machine is mounted on a trolley base to have a greater degree of mobility. In order to move the machine to any position on or a
How is a micrometer used?
Q. Stacking in the Applicators storage? Stacking in the Applicator's storage yard shall be in accordance with good safety practices and/or OWNER Specifications. Sufficient spac
understanding the scope.
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