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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.
Cermets Such are the variation of cemented carbides while the carbides of W and Ti are solidified in the softer matrix of Co and Nickel to get high hardness, resistance to hig
It shows the test rig for the assignment of an indeterminate structure at the Materials Lab. The indeterminate structure consists of three pin-jointed members made of the same stee
Importance of angle of twist: Q: What is the importance of angle of twist? From relation T / J = G. θ / L ; we have θ= T . L / G . J As G , L , J
Compute the force in the rod: A rod ABC rotating at 20 rpm about a vertical axis through A, supports a ball of mass 10 kg at its lower end. It is fixed in position by the rod
what is hartnell governor
applications of parallelogram
DRIVESHAFT SEALS Packed gland Sealed by several layers of asbestos or cotton yarn Sometimes used two boxes with intervening space separated by steam Problems: T
What is Hopper unit Two hydraulically operated folding type hoppers are provided on the front side of the machine. The capacity of the hopper is 4.25 CM.
Maximum slope and maximum deflection: A simply supported beam of span l is subjected to two concentrated loads at one-third span through two supports. Discover the maximum slo
Refractory Materials These materials are made up of engineering ceramics that are quite expensive in their pure forms. Such materials are also complicated to form. Most indust
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