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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.
Fire safety management on railway stations: Storage tanks are not allowed above underground structures or within a certain distance of them. Some staff exits are
Guides for the fire risk assessment: In the UK, the Government produce guides for the FRA process that are free to download. There are a range of guides covering the ran
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How do you find initial monthly payment for the second year after an adjustable-rate mortgage?
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Common faults - Fire safety management: Common faults found are: Combustible items left in protected routes Locked exits Fire doors wedged open Exits obstru
Q. Describe the types of flames obtained in an oxyacetylene gas welding process giving the applications. There are three types of flames in the gas welding on the base of the
Most vehicles have the XZ plane as a plane of symmetry which results in D = 0 and F = 0. Further if the disturbance velociies are small then terms proportional to the square and pr
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