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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.
Air at 1 atm, 300K, and Re = 50,000: a. Flow across the cylinder with a diameter of 10 cm. b. Flow inside a tube with a diameter of 10 cm. c. flow along the flat plate of
assumptions made in deriving a bending formula
Q. Show Mass energy Relation? Until the time of Einstein, mass and energy were considered as two different physical quantities. But in 1905, with the help of postulates of the
Kinematics: This is that branch of Theory of Machines that deals with the relative motion among the several machine parts; without referring forces or torques that cause motion.
Q. What is Boiler feedwater? The boiler feedwater will be a mixture of desalinated water, treated make-up water and returned condensate, deaerated and heated, supplied by other
Two concentric perforared plates are seperated by a 200mm launder and form the flow exit for a clarifier (figure 1). The inlet water flow of 1200 mcubed/hour into the clarifier is
(a) What do you understand by the following : (i) Open System (ii) Closed System (iii) Concept of ‘Work' (b) 0.014 m 3 gas at a pressure of 2070 KPa expends to a pressure of
introducation to sort assig
how to solve bending moment equation
Define the nature of force in a member of truss: How can you define the nature of force in a member of truss? Sol.: We know that whenever force is applied on a cross se
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