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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.
Importance of angle of twist: Q: What is the importance of angle of twist? From relation T / J = G. θ / L ; we have θ= T . L / G . J As G , L , J
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explain ways of representing alternative quantities;1)phasor representation 2)graphical representation 3)complex waves 4)addition and subtraction of sine wave
Your company received an order to machine a batch of 150 steel parts that are 73.0 mm in diameter and 250 mm in length. One of the processes is a finish turning operation. Where th
(a) Illustrate Fourier Series and calculate the constant coefficients. (b) A Harmonic motion is provided by x(t) = 10sin(30t -π/3) where t in seconds and phase angle in radians.
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All shell and head joints shall be double-welded butt joints with full penetration. In cases where double welding is impractical, the root pass shall be made by the GTAW process.
Planning of Railway Stations and Facilities Provided: The planning of railway stations should cover the following aspects: (a) The site selected should be easily ac
how do i determine the operational factor of safety in tension
Determine APF of BCC and theoretical density in g/cm 3 , assuming the value of r=1.28A 0 and atomic weight is 60g/mol. Determine APF of FCC and theoretical density in g/cm 3 ,
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