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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.
connecting rod AB of length L support a variable compressiv force F .Drive an expression for the moment of F about the crank axis O in the term of F L r and angle
Bolter: ( k E 2 - kE 1) = 0, ( pE 2 - pE 1) = 0, w 1-2 = 0 Now, q 1-2 = w 1-2 ( h 2 - h 1 ) + ( kE 2 - kE 1 ) + ( pE 2 - pE 1 ) q 1-2 =
Determine reactions at supports of loaded beam: Determine reactions at supports A and B of loaded beam as shown in the figure given below. Sol.: First co
What is the chief advantage of CIDR over the original classful addressing scheme? CIDR stands for Classless Inter-Domain Routing is a new addressing scheme for the Internet, th
Induction Heating: Alternating current throughout induction coil adjacent the part to be treated induces eddy current via the part that is so heated. The benefit of such heati
Find out the reactions at hinge: A board ABCD is held in position as shown in Figure by a cable BE and a hinge at A. If the weight of the board is 5 kN, find out the reactions
hardness of bore well water is less than sea water .justify
METAL TRANSFER The continuously fed electrode wire is melted in the arc heat and the droplets thus formed at the wire tip are transferred to the weld pool. The way in which mater
what is lotus effect
Consider fully developed laminar flow with constant properties in a circular tube. Let there be heat transfered to or from the fluid at a constant rate per unit of tube length.Ad
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