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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.
Pitot intakes: This intake is suitable for subsonic or low supersonic speeds. Examples, 707, 747, A300B, Tristar, etc. The intake is usually short and is very efficient becau
Atlas Inc. is planning to invest in a 4-year project which has the same risk as the firm’s existing assets and operations. The project requires a $150,000 initial investment and is
TRANSISTOR CONFIGURATIONS: Before a transistor can be used, it must be connected into an input circuit (by two wires) and an output circuit (two wires). However, because the t
VDD=20V,RG=1MOHM,RD=3.3KOHM,RS=1KOHM,IDSS=8MA,VP=-6V
Q. W hat do you understand by crystallographic notation of atomic planes/Explain with the help of examples. Ans.Crystallographic Notation 1. Crystal Symmetry:
HEAT TREATMENT PROCESS
how it used in real life..
Oil supply failure - Propeller: To prevent an overspeed caused by an oil supply failure, one of two methods may be employed: • Hydraulic lock valve The pitch lock mecha
Safe Operating Range The SOR is the max distance between airfields which the aircraft can fly with full allowance for headwind, diversion, stacking. • Distance flown in climb
Is the dividend paid on common stock taxable to shareholders? The results paid on common inventory are taxed on two stages in the U.S. First at the company stage, as a results c
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