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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.
(a) Describe that internal energy is property of the system. (b) one kg of air at 1 bar and 300k is compressed adiabatically till its pressure becomes 5 times the original press
when 2 bodies are connected by a string show the direction of acceleration
Pola r Modulus(Z p ): It is the ratio of polar moment of the inertia to outer radius. Z p = J / R Polar Modulus of solid body ( Z p ) =[ ?/32. D 4 ]/ D
The Nissan leaf has a battery size of 24 kWh and autonomy of 84 miles.
Points and Crossings: Function Railway technology is based on an exclusive track for movement. For diverting trains from one track to another, some arrangements are n
Norma l Temperature and Pressure (N.T.P.): The conditions of temperature and pressure at 0°C (273K) and 760 mm of Hg respectively are called normal temperature and pressure (
A single jet pelton wheel runs at 300 rpm under a head of 510 m. the jet diameter is 200m, its deflection inside the bucket is 165 o and its relative velocity is reduced by 15% be
Planning A New Airport: Elements of Airport Planning The elements of planning for a new airport are : (a) Demand Forecast (b) Site Selection (c)
Connecting Rod : It connects the piston and the crankshaft and transmits the power from the piston to the crankshaft. It has a small end (through which gudgeon pin passes to conne
Schedule Selection Of the p excellent continuations, q (first) operations are scheduled. This offers p latest partial schedules. After that step 1 is repeated. These steps'
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