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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.
Methods of analysis of trusses: What are the methods of analysis of trusses? What is found when the analysis of a system is done? Sol.: The forces in the members of
Prove the parallelogram law of forces: Assume that the two forces P and Q act at a point ' O ' as shown in figure given below. The force P can be represented in magnitud
Gears interchange between Y2K and non Y2K model: Check for mixing of Y2K and non Y2K gears by seeing the identification marks provided on the gears.
a) Describe Quality. What are various quality measures. b) A steel chairs manufacturer is also the quality inspector in his manufacturing unit this parameter of a chair being de
Q. Seismic Loads For Structure-Mounted Equipment? For equipment mounted in a structure above grade, the governing equation for seismic force is: F p = A v C c Pa c W c , wh
As a student engineer illustrate what design consideration you would like to account for parts manufactured by machining and forging. A circular bas of 500mm length is hinghed f
The spring controlled governor of the Hartung type has two rotating masses each of 2.5kg and the limits of their radius of rotation are 100 mm and 125 mm. The each mass is directl
Calculate the maximum allowable internal pressure to which a cylinder with an internal diameter of 200 mm and external diameter of 300 mm may be subjected if the cylinder is to hav
.what is paradisaical drain
Find the distance of weight ‘x’ from support: The t wo weights C = 2000N and D = 1000N are located on horizontal beam AB as shown in the figure given below. Find the d
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