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Cellulosic ElectrodesIn the AWS E 6010 and E 6011 series of electrodes, the protective covering is composed of cellulose (C6H10O5) and silicate binders. The cellulose decomposes in arc accordings to the following equation:(C6 H10 O5 + 0.5 O2 = 6 C+ 5 H2)Cel lulose + Oxygen = Carbon Monoxide + Hydrogen. The products of this reaction, carbon monoxide and hydrogen represent a total of 400 times increase in the volume of gas generated over the volumes of the unburnt coating. These gases rush outward from the arc and push the atmosphere away from the puddle. The gas produced raises arc voltage and thereby increases the amount of heat produced from the electricity in the arc. The cellulose electrode has therefore, a very hot arc even at lower current value and this together with the gases evolved from the coating at high pressure give rise to a "digging" arc and deep penetration. Naturally there is very little slag formed, and this makes welding possible in all positions.This electrode is extremely good for pipe welding. The weld metal is of good quality. It generally meets with high pressure tests & X - ray tests very easily. This electrode requires a slightly longer arc for complete burning of the cellulose in the flux coating.
Reduce system to a single force: Q: A system of parallel forces is acting on rigid bar as shown in the figure given below. Reduce this system to a single force
Polyhedra and Euler's Formula The b-rep of a polyhedra that are holomorphic to a sphere are topologically valid if they satisfy the following equations : F - E + V - L = 2 (
Calculate force required for equilibrium: A member ABCD is subjected to the point loads P 1 , P 2 , P 3 an d P 4 as shown in the figure given below
compressor’s volumetric efficiency can also depend on the compressor’s ratio.
Answer any five questions. a) Describe calibration and state its types. b) Which are the kinds of test signals? c) What is the basic working principle of piezo-electric tr
What is Metal Cutting Tool? A cutting tool (or cutter) is any tool which is used to remove material from the work piece by means of shear deformation. Cutting may be completed
a) Determine a real root of the equation cosx = 3x-1 correct to three decimal places using Iteration method. b) Detremine the real root of the equation logx - cosx =0 by Newton
1 Prepare a suitable system Memory Map over the first 3K of memory, a suitable PIO configuration and associated Z80 PIO initialisation words in order to support a single electro-hy
calculate the vertical reaction at A in Newtons
ELECTRO SLAG WELDING This process is similar to the electro gas welding process designed for making butt welding in the vertical position in one single pass and the plate
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