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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.
Resistance welding electrodes and holders Requisites For Electrodes : The resistance welding electrodes are meant for the following functions: Conducting electricity
(a) What are fluids? How are they classified? (b) Classify the several kinds of manometers. (c) Define the following (d) Define metacenter (1) Steady flow (2) Unsteady
more about the carbon dioxide(co2) moulding process,for my seminar topic.
COMMON RULES CONCERNING CORRESPONDING OPTION: Let us consider the DATA DIVISION entries as shown below. Now, let us see which data items will be moved if
Explain the Advantages of Rack Cutter? a. A single cutter of any specific pitch can cut gears of any number of teeth having similar pitch. b. The tooth profile produced is m
Enthalpy: Sol: The enthalpy is total energy of gaseous system. It takes into consideration, internal energy and pressure, volume effect. Thus, it can be defined as follows:
write the conservation of mass for steady flow throught a streamtube with asingal one dimensional inlet 1and exit 2
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show that work is a path function and not a point funtion ?
Applications with Medium Laser Power Several laser welding applications have recently evolved in this power range of 1 to 10 kW. Because, the laser provides a basis for co
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