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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.
Q. What do you mean by Bunds and Dikes ? A bund (or dike) is an embankment or wall of brick, stone, concrete or other impervious material, which surrounds the entire perimeter
Taking Care of Occupational Safety The most important development in occupational safety and health has been the introduction of legislative measures adopted by various gover
what is the average speed of travel in gas tungsten arc welding
which are the different types of molding sands?explain each
A square column 410 x 410 mm (along with 4 No. 16 mm bars) carries a dead load of 1020 kN and an imposed load of 410 kN. The foundation soil has a safe bearing capacity of 200 kPa.
# how to calculate governor effort
Q. Scope of work for a project in Mechanical Engineering? The Mechanical Engineering scope of work for a project involves the design and specification of mechanical equipment a
Q. Method of construction - Plant layout? Plant layout is influenced by the intended method of construction, whether the plant is being constructed on-site, or whether modules
The steam that leaves the super-heater is expanded from 130bar at 535°C to 25.2bar at 310°C in a high pressure turbine. The steam from the exit of the HP turbine is reheated to 535
Low Hydrogen Electrodes Low hydrogen electrodes are so called because their covering is low in hydrogen bearing compounds and only traces of hydrogen or moisture are present in t
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