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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.
Closed, open and isolated system-Thermodynamics system: Sol: In thermodynamics the system can be defined as the quantity of matter or region in space upon which attention is
Q. Types of buildings required for Plant? The following types of buildings may be required: • Control rooms / Motor Control Centers (MCC) / Equipment rooms. • Electrica
Determine the reactions at bea: A cantilever AB, 1.8 m long is fixed at A and carries uniformly distributed load of 20 kN/m over its entire length and a point load of 30 kN at
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defference between rankine and cornot cycle
Breather tube : Check breather tube for blockage and also air filter box hole where breather tube is connected, for any blockage.
Austempering: The component to be hardened is initialy austenised and after that quenched into a lead or salt bath held at just over the martensite transformation temperature
Force on Rigid body - Non Rigid body: As Rigid body cannot change its shape on application of any force, It will begin moving in the direction of applied force without any
A frame PQRSTU is hinged to a rigid support at P and is simply supported at T. It is loaded as indicated in the figure below. Determine the magnitude and nature of the force in the
Value engineering & Value analysis VA may be defined as looking at an existing product or a product already in production to see if changes in design or process can reduce prod
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