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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.
Principles of fire risk assessment: The following principles of FRAs apply in the UK as they do in the USA: justifying assumptions, stating data sources,
Thermoelectric effect The measurement of temperature using a thermocouple relies on Seebeck effect. The electrons occupy different energy levels in different materials
Fluid Cleaning This procedure involves spraying an emulsive type surface cleaning fluid into the compressor whilst the engine is turning either on the starter motor or at low R
1- plot and creat x1(t)=4exp(t/5),x2(t)=Sin(2pift+Pi/2) 2-write a c fucntion to compute convolution of n2 finite series ands plot 3-implemet an FIR filter in c in CCS
Plasma Arc Welding (PAW) is a special form of gas tungsten arc welding in which constricted plasma arc is directed at the weld area. In PAW, a tungsten electrode is contained in a
explain compensated semiconductors
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What are the no-arbitrage lower bound, and the no-arbitrage upper bound, of the vertical spread
what is the best Master thesis that can be done in this major ?I need suggestions regards
A type of brake used to keep the vehicle from rolling when it is parked. The standard Parking brake locks the rear wheels to keep the car from moving. Parking brake cable is fixed
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