In welding copper alloys with TIG arc welding

A Direct current with straight polarity is used
B Direct current with reversed polarity is used
C Alternating current is used
D Any one of these

Correct Answer: Direct current with straight polarity is used

In welding copper alloys with TIG arc welding Direct current with straight polarity is used
Copper and copper-base alloys have specific properties which make them widely used. Their high electrical conductivity enable their use in the electrical industries, and the corrosion resistance of certain alloys makes them very useful in the process industries.
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Related Questions

In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as Positive pole of the welding arc, the arrangement is known as
A Fusion
B Reverse polarity
C Forward welding
D Direct polarity
In TIG arc welding, the welding zone is shielded by an atmosphere of
A Helium gas
B Argon gas
C Either (A) or (B)
D None of these
In welding magnesium with TIG arc welding, direct current with ________ is used.
A Straight polarity
B Reversed polarity
C Both (A) and (B)
D None of these
If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as
A ARC
B Short ARC
C ARC length
D ARC blow
In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done in all the positions i.e. flat position, vertical position or inclined position.
A Globular transfer
B Spray transfer
C GMAW practice
D Dip transfer
In TIG welding, thoriated tungsten electrodes are used, because it
A Has higher current carraying capacity
B Has better electron emissivity
C Is stronger than ordinary tungsten
D Is easy to prepare
In arc welding, the electric arc is produced between the work and the electrode by
A Voltage
B Flow of current
C Contact resistance
D All of these
In submerged arc welding, an arc is produced between a
A Carbon electrode and the work
B Metal electrode and the work
C Bare metal electrode and the work
D Two tungsten electrodes and the work
In arc welding, the temperature of heat produced by the electric arc is of the order of
A 3000°C to 4000°C
B 4000°C to 5000°C
C 5000°C to 6000°C
D 6000°C to 7000°C
If 2 kg of metal, of which 1/3 is zine and the rest is copper , be mixed with 3 kg of metal, of which 1/4 is zinc and the rest is copper , then what will be the ratio of zinc to copper in the mixture?
A 17 : 43
B 13 : 42
C 19 : 43
D 15 : 42

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