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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.
Plastics, Reinforced Plastics And Adhesives Introduction Organic materials particularly that occur in nature like wood and leather have been employed for engineering caus
(a) Derive a mathematical expression to determine the efficiency of Bell Coleman Cycle. (b) A dense air refrigeration cycle acts between pressures of 4 bar and 16 bar. The air t
temparature stresses in composite bars
Dear Engineer! I have an aluminum tube(6061) fixed at one end (Cantilever Beam). The length is 180” and the load on the other end is 150 lbs. Question: What size of tubes I s
Screw Conveyors: Screw conveyors are used principally for transmitting materials in the form of powder or paste with the application of rotating screw. For example feedin
(a) Reduce expression for the net pressure and depth of centre of pressure in case of an inclined plan surface submerged in a fluid. (b) Derive Euler's equation of motion along
(a) Describe the terms "Refrigeration" and "Air-conditioning". Determine the units of Refrigeration ? (b) The capacity of refrigeration is 400 TR when working between -6 o C and
Q. Describe facing material? Facing Materials: These materials when added to the moulding sand tend to obtain smoother and cleaner surfaces of castings, help easy peel
An aircraft flap actuator housing made of cast magnesium alloy ZAG3A-T4 with uniaxial yield strength σ Y = 14,000 psi. At the suspected critical point the calculated state of str
A 16-bit A/D board is arranged to accept voltage signals ranging from -5V to +5V. The A/D board is used to monitor the output from the Wheatstone bridge shown below. The strain g
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