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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.
Instantaneous Centre: this is a point around which link rotates at a particular instant. Absolute Instantaneous Centre: this is a fixed centre around which link rotates.
Reaction Bonding Such bonding is attained by arranging for two or more components of a compacted body to respond to form both a desired phase and a bond among particles. The r
trend monitoring in cbm
(a) Describe the terms "Fluid jet" and "Vane" in Fluid Machine. (b) What is impulse - momentum principal in analysis and design of turbo machines.
Q. Horizontal Vessels and Vertical Vessels? Horizontal Vessels A horizontal vessel, designed to support a full weight load of water, shall be tested while resting on its sup
Clausiu s statement: It is impossible to construct this type of H.P. which operates on cyclic process and allows transfer of heat from colder body to a hotter body without th
model building is the essence of operation research
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
Shielded Metal Arc Welding Single pass fillet welds upto ¼" (6.4 mm) maximum and ¼" groove welds made with a single pass or a single pass each side, may be made by using a
Planning A New Airport: Elements of Airport Planning The elements of planning for a new airport are : (a) Demand Forecast (b) Site Selection (c)
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