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SHIELDING GASES
Shielding gas is directed by the torch to the arc and weld pool to protect the electrode and the molten weld metal from atmospheric contamination.
Argon and helium or mixtures of the two are the most common types of inert gas used for the shielding. Argon hydrogen mixtures are used for special applications.
Varignon theorem: State Varignon's theorem. How it helps in determining of the moments? In which type of condition is it used? Sol.: Varignon's theorem also called Law
Scrapper: Scrappers are used to scrap gasket or other such materials from flat or irregular surface. Scrappers of several sizes are shown in Figure. Figure : Scrapper
Quality Improvement : CAD can improve the quality of engineering design by increasing the efficiency and effectiveness of the designers. This can be observed with excellent
sensitivity of governors
methods in surface development
when 2 bodies are connected by a string show the direction of acceleration
Q. Categorization of Geometric models? Modern CAD systems define objects in 3-D. Thus, the designer can construct 3-D model of objects conveniently and store the database of th
truss is shown in the following figure. Compute the horizontal deflection of joint D produced by both the load and fabrication error (bar AE is 40mm too long). For all bars, area A
Law of coulomb friction: Coulomb in the year 1781 presented certain conclusions which are called as Coulomb's law of friction. These observations are based on experiments on b
Equivalen t force System: An equivalent system for the given system of coplanar forces is the combination of force passing through given point and moment about that point. Th
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