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SHIELDING GASES
Shielding gas is directed by the torch to the arc and weld pool to protect the electrode and the molten weld metal from atmospheric contamination.
Argon and helium or mixtures of the two are the most common types of inert gas used for the shielding. Argon hydrogen mixtures are used for special applications.
Upward Compatibilityof IGES Upward Compatibility : The need for generations of processors to parse files compliant with earlier versions of IGES thwarted the breadth and rate o
(a) Explain different types of frames. Compare their merits and demerits. Diagram and illustrate a frameless construction. (b) Illustration briefly the constructional features o
Q. Factors in the design of high temperature materials? There is typically little correlation between room temperature strength and high temperature strength of creep-resistant
Enthalpy: Sol: The enthalpy is total energy of gaseous system. It takes into consideration, internal energy and pressure, volume effect. Thus, it can be defined as follows:
Simple Rules FIFO (first in first out) PN j = t aj SPT (shortest processing time) PN j = o j ODD (earliest operation due dates) PN j = t dj EDD (earliest job due
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Explain Atmospheric Pressure (P atm ) Atmospheric Pressure is the pressure exerted by atmospheric air on any surface. It is calculated by a barometer. The standard values of it
Third Gear Position: When gear M3 on the main shaft is in mesh with gear C3 on the counter shaft then this is known as third gear position. The fixed gear M3 rotates with mai
Power metallurgy is much faster production whereas holding closer sizes.
Q. Describe facing material? Facing Materials: These materials when added to the moulding sand tend to obtain smoother and cleaner surfaces of castings, help easy peel
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