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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.
Theore m of parallel axis It states that if the M.I. of plane area about the axis passing through the C . G . can be denoted by I G . The M . I . of area about any other
Geometric information of B-rep Geometric information are usually equations of the edges and faces.
Express the compression force C in the hydraulic cylinder of the car hoist in terms of the angle Θ, see Fig Q3. The mass of the hoist is negligible compared with the mass of the ve
Importance of angle of twist: Q: What is the importance of angle of twist? From relation T / J = G. θ / L ; we have θ= T . L / G . J As G , L , J
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Materials which can store electrical energy are called (A) magnetic materials. (B) semi conductors. (C) dielectric materials. (D) super conductors. Ans: Mater
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Evaluate total extraction: The steel tie rod 50mm in diameter and 2.5m long is subjected to pull of 100 KN . To what length the rod must be bored centrally so that total ext
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5. Calculate and draw the Shear force and Bending moment diagrams for the loaded beam and determine the maximum moment M and its location x from left end
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