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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.
why pre sintering needed in powder metallurgy
i have designed a crankshaft for 3 cylinder engine i want to know how to balance it
discus the method to finding the width of impeller blades in a rotary air compressor
Explain Cutting Speed - Cutting Parameters It is relative speed (V 1 ) between wheel and the Work piece. It is expressed in m/sec. V=Cutting speed=V 1 =
The objective of the project is to protect damage of the DC motors. If the motor is not working it will be shown with red light, if working normally then green and if working at a
what is Direct and Reverse crank method of balancing
Magnesium And Its Alloys Magnesium is a light metal along with density of 1.74 g/cm 3 . Magnesium is more costly than aluminium as density 2.74 g/cm 3 along with which it comp
(a) What do you understand by couple moment. Is it a free vector ? (b) A force F = 10i + 6j - 6k N performs at a position (10, 3, 4) m relative to a coordinates system. Determin
Q. Show Prevailing wind conditions for plant layout? Prevailing wind conditions influence the design considerations for the location of the flare or vent stack. It is vital tha
Define Cam Operated Clamp 1. The cams operated clamp find wide application and are fast and positive in action. 2. These should not be used where vibrations are present or w
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