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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.
Welding Head Submerged arc welding head consists of the wire spool, wire feed system, flux delivery hopper and electrical contact nozzle. The electrode wire is unwound from the s
Total decrease in length: Q: A hollow cast iron cylinder 4 m long, 300 mm is the outer diameter, and thickness of metal 50 mm is subjected to central load on top when standin
(a) Show that the force exerted by a jet of water on an inclined fixed plate in the dissection of jet is given by fx = .a.v 2 . sin 2 θ. Where a is area of jet, v is velocity of j
Show that the force exerted by jet of water on a fixed semi-circular plate in the direction of jet when the jet strikes at the centre of the semi-circular plate is two times the fo
A motor cycle with its rider, weight 250kg, the centre of gravity of the machine and rider combined being 60cm above the ground level when the machine is standing upright. Each roa
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Currency Bull Spread and Bear Spread: A currency bull spread is constructed by buying a call option for a particular underlying currency and simultaneously writing a call opti
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The transmission output shaft for a heavy goods vehicle can withstand a safe working shear stress of 54MPa. Its outside diameter is 54mm and its internal diameter is 48mm. Calculat
In designing piping systems, it is sometimes desirable to estimate the appropriate pipe length for a given diameter, pump power and flow rate. In such cases, if minor pipe losses a
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