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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.
Friction: you have learnt laws of friction and problems involving dry friction. The relative sliding motion of one body on another body is resisted by forces called as frictio
how do you differentiate between wet steam and dry steam?
Q. How can you implement Permeability test As already defined, permeability of porosity of the moulding sand is the message of its ability to permit air to flow through it.
form tool design
Problem s on Cantilever Truss: In the case of cantilever trusses, it is not required to determine the support reactions. The forces in members of cantilever truss are obtaine
length of an close belt drive
Determine the diameter of wire - close coiled helical spring: A close coiled helical spring has to absorb 100 N-m of energy while compressed to 10 cm. The coil diameter is 10
Define Rack Cutter Generating Process? The rack cutter generating process is also called shaping process. In this method, the generating cutter has the foam of basic rack for t
Plate oil Separator: Check for plate oil separator fitment.
Determine change in length of the bar: A steel bar is subjected to loads as shown the given figure. Determine change in length of the bar ABCD of 18 cm diameter. E = 180
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