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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 alarm systems: Fire alarm systems can be very complex and it is usually not possible for an enforcing officer to check all the cabling, the components, the software and t
Interior noise is basically airborne or structure-borne. The excitation sources of vibratation and noise from engines can be divided as mechanical, combustion, and flow sources.
Given data for an F-4 (W=40000 lb, S=530 ft^2, Ta@sea level=35800 lb, Mach=1.5, h=20000 ft (std day), Cd0=.0224, k=.1516) find aircraft''s specific excess power in straight-and-lev
A body, with a volume of 2m^3, weights 40 kN. Determine its weight when submerged in liquid with S= 1.59.
FUEL FLOW METERING: Fuel flowmeters are fitted in aircraft to give an accurate indication of the rate at which fuel is being used and the total amount of fuel that has been use
how to prepare assignment note on culverts in between 4 to 6 pages
Maximum speed -Pro craft The standard approach for prop-driven aircraft is to assume that engine and propeller together produce a power (as opposed to thrust) output that is ind
1. What are the core competencies that produce value? Answer: The core competencies of an organization which produce value are: i. Marketing: Every organization produces a product
numericals
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
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