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Manual Metal Arc Welding
Manual metal arc (MMA) welding, is a type of manual arc welding process that uses a consumable electrode coated with flux to lay the weld. An electric current, in form of either alternating current or direct current from a welding power supply, is used to form an electric arc b/w the electrode and the metals to be joined. As the weld is going on, the flux coating of the electrode disintegrates, giving off vapors that serve as a shielding gas and providing a layer of slag, both of which protect the weld area from atmospheric degradation.
Equation of motion of lift: Write equation of motion of lift when move up and when move down Assume, W = Weight carried by lift m = Mass carried by lift = W
Pulsed DC Welding Pulsed DC involves the repetitive variation in arc current from a background (low) value to a peak value. Adjustments of the pulse current time, background cu
Find out the forces in members: A braced support ABC is loaded as illustrated. Find out the forces in members AB, BC, BD and AD by the method of joints. Check out the results
Quenching and Tempering Cast iron pearlite structure might be heated to lower critical temperature and after that quenched to effect extremely rapid cooling. This treatment re
The critical Temperature of a gas is the highest temperature for which isothermal compression of the gas results in ? Will an adiabatic ?ash result in more, the same, or less va
Keywords related to Air transportation: Airfield/Airport : The area which contains the facilities needed for the operation of aircraft. Apron
Q. Explain the terms centre of gravity and centroid. Sol. : A point can be found out in a body through which resultant of all such parallel forces acts. This point through
extraction of refractories
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Heat Treatment of Tool Steels This treatment in case of tool steels in a significant step before actually employing the tool. Most properties are attained after heat treatment
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