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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.
Use roller support - steel trusses of bridges: Explain, why do we use roller support in case of steel trusses of bridges? Sol. : In the bridges most of time external f
Priority Rules A main concern rule is an algorithm that evaluates a priority number PN j for all operation j which enters the queue in front of a station (processing, cell, wo
Components of power plant &it''s functions
Q. Design Gas Compressors? As gas compressors are often high investment equipment, it makes sense to locate these well away from other equipment to minimize potential fire dama
Carnot Cycle - thermodynamics: Carno t Cycle: Sadi carnot; this is based on second law of thermodynamics introduced the concepts of reversibility and cycle in the year 1824
Consider a fully developed laminar flow of a fluid through a 200 m long and 4 cm diameter horizontal and circular pipe. The density and the viscosity of the fluid are 1400 kg/m 3
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Answer any five questions. a) Describe calibration and state its types. b) Which are the kinds of test signals? c) What is the basic working principle of piezo-electric tr
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An open belt drive connects two pulleys 1.2 m and 0.5 m diameter on parallel shafts 3.6 m apart. The belt has a mass of 1 kg/m length and the maximum tension in it is not to exce
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