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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.
Q. 1 A 50 cm diameter pipeline in the Arctic Carries hot oil at 30 0C and exposed to a coefficient surrounding temperature of -20 0C. Special powder insulation 5 cm thick surround
If all states are measured by appropriate sensors and interfaced to the flight control computer then allthe states may be fed back and there is no restriction on the choice of K. S
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,
Uncertainty propagation In order to calculate the error of a quantity derived from a mathematical formula which has measured variables with errors, one should use the uncertain
compare conventional lagoon,aerated lagoon and activated sludge process,including process flow diagrams and hydraulic retention timesquestion #Minimum 100 words accepted#
a rectangular beam of size 40mm*60mm is subjected to bending. the maximum bending stress is limited to 75N/mm^2. find the moment of resistance of beam section.
Procedures for starting and ground running: Before starting and ground running any gas turbine powered aircraft, several considerations must be taken into account. The first an
simplied hybrid model of cc amplifier
Need help using FEA/FEM software (MSC Marc/Mentat) to model and analyze a system,then write a lab report about it, it is due tomorrow... anything you can do for me?
compute IDFT using DIT and DFT X(K)={20,-5.828-j2.414,0,-0.172-j0.412,0,-0.172+j0.414,0,-5.828+j2.414}
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