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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.
Determine least value of work: Q . Determine least value of W as shown in the figure given below to keep the system of connected bodies in equilibrium µ for surface of c
Q - Derive bending equation that is,; M / I = σ / y = E / R . Sol.: With reference t
Which of the following is an open pair?
3. A string of length l is fastened to two point A and B at the same level at a distance ‘a’ apart. A ring of weight W can slide on the string and a horizontal force P is applied s
what is crippling load in column and strut
Jominy Test: Additionally convenient laboratory test for harden-ability is Jominy test. A standard test piece of steel as illustrated in figure of The Jominy Test of Harden-ab
The salary calculation method for employees of a company is as follows: (1) If the number of working hours exceeds 120 hours, an additional 15% will be issued for the excess part;
How is works watery flayer?
Arm of Couple: Explain couple and Arm of couple? Sol.: If the two equal and opposite parallel forces (that is equal and unlike) are acting on a body, they do not have a
Find out the effort required to run this machine: The efficiency of a machine is 75% while an effort of 20 N is required to lift a load of 160 N. Compute the velocity ratio an
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