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WIRE MELTING CHARACTERISTICSA non linear relationship exists between the rate at which the wire is fed into the arc and the current required to burn it off to maintain a constant arc length. This is known as the burn off characteristic and differs for each filler wire composition and diameter. The curves shown in Fig. illustrate the burn off characteristics of steel in Argon + O2 mixture. It will be seen that to alter the welding current a proportionate increase in the wire feed rate is required. The smaller the diameter of the wire, the faster is the wire feed speed required to reach the same current.
Support reaction: Explain the support reaction? What are different types of support and their reactions? Sol.: When the numbers of forces are acting on a body, and the
What is Time-Study ? How the standard time is determined in Time-Study ? What are the Merit-Rating ? Illustrate various methods of Merit-Rating. Describe the Break-Even-Analy
Sand blasting handling method: On last experiment we had decided to use 3.0 bars as it shown better result. Now we had to investigate the sand blasting handling
Cylinder Head De-carburising and Valve Lapping: Cylinder head mounts on the top of the engine cylinder, the inner side of the cylinder head is always in direct contact of combusti
Calculate the tension T in the rope: Q: A man raises 10 Kg joist of length 4m by pulling on rope, Find out the tension T in the rope and reaction at point A for the posit
with usual notations the effort lost due to friction is given by A) P-W/V.R B) P×V.R-W C) P-W×V.R D) P+W/V.R
Find out Deflection under the load: A beam of span 4 m is subject to a point load of 20 kN at 1 m from the left support and a Udl of 10 kN/m over a length of 2 m from the righ
Calculate Additional force required to maintain equilibrium: Fo r the system shown in figure find the additional single force required to maintain equilibrium. Sol.: L
Cranes are used to move materials vertically and laterally in ain area of limited length. They may he operated hydraulically pneumatically or electrically the important ty
Example of simple exponential smoothing: A TV manufacturer utilizes simple exponential smoothing with α = 0.1 to forecast demand. For the first week of March, the forecast was
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