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In spot welding, the parts to be joined are normally over lapped. The work piece are clamped between two water cooled copper electrodes. On the passage of a high transient current, the interface melts over a spot and form the weld. The cooling at the electrode limits the size of the spot. A very high current is needed for a very short duration to complete the welding. The interfaces to be joined are initially cleaned by various methods, including scratch brushing and vapour decreasing. A spot weld normally contains some porosity at the weld centre, which unless excessive is harmless.
The spot welding process is difficult to use for highly conductive materials such as aluminum and magnesium.
Summing amplifier: As the title implies, this is an adding device. The circuit can take any number of voltage inputs, and the output voltage is simply the sum of these inputs.
Turbine engines cooling : Turbine engines are designed to convert heat energy into mechanical energy. The combustion process is continuous and, therefore, heat is produced. On
High frequency mode of bjt amplifier
Firm A needs to purchase a new machine. If the machine is purchased, it will replace an old machine purchased 10 years ago for €105,000 and which is being depreciated on a straight
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i want to do project in the area wing in aircraft...please give some sugestions or ideas in that
Working capital: Laurel Electronics reported the following information at its annual meetings. The company had cash and marketable securities worth $1,235,455, accounts payables wo
Feathering the propeller: If there is an engine failure in flight, the propeller would windmill creating drag and increasing any damage that had occurred in the engine. Feathe
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Sinking Fund Depreciation Method Prior to World War II little attention was given to depreciation, and some business actually established savings accounts in which uniform annu
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