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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.
MODERN ARC WELDING POWER SOURCES Recent advances in the field of solid state power electronics have helped to improve the status of welding power sources. With the development rel
Magnetic Alloy Steels: These steels are divided into two sets. Such which retain their magnetism and that which do not. The steels which retain their magnetism are termed as
In case of welded vessels why is stress relieving in the form of post-weld treatment necessary? When a metal is welded together the point at which two surfaces are joined are s
Q. Show the Vessel Supports? Approved materials and allowable stresses, shall be used for vessels and their supports. For structural shape support members in compression, wh
Lean Mixture: It generally ranges from approximately 15 : 1 to 17 : 1. By the use of this fuel, engine runs for higher economy.
In a sun and planet type gear, the annular gear (D) has 100 internal teeth, the sun gear (A) has 50 external teeth and a planet gear (B) has 25 external teeth. The gear (B) meshes
Advantages of work energy principle over D''alambert''s principal.Explain in detail
APPLICATION OF GOVERNOR
Explain the 3-2-1 Principle of Location A work piece can be positively located by means of 6 pins so positioned that collectively they restrict the work piece in nine of it
A paint manufacturing company has a manufacter function Q = K+ √L. For this manufacter function MPK = 1 and MPL = 1=(2√L). The rm faces a price of labor w that equivalent $1 per u
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