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Its easy operation
Its high metal deposit rate
Its use in both ferrous and non-ferrous metals
Both its easy operation and its high metal deposit rate
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Ohmic resistance
Generation of heat
Application of forging pressure
Generation of heat and application of forging pressure
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Seam
Butt
Spot
Upset
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Hazardous
Difficult
Economical
Useful
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One-third
Two-third
One-half
One-fourth
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Plasma arc
Laser
Electron beam
MAG
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Coated electrodes
High open-circuit voltage
No arc blow
Dc power supply
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It is customary to use welding machines
Its voltage is too high
Its voltage keeps fluctuating
It is impractical to draw heavy currents
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Flash
MIG
TIG
Electron beam
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Electrode is the hottest
Workpiece is relatively cooler
Base metal penetration is deep
Heavily-coated electrodes are used
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Pointed
Disc
Flat
Domed
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MIG
Atomic hydrogen
Resistance
Submerged arc
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Using bare electrodes
Welding away from earth ground connection
Using ac welding machines
Increasing arc length
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There is occurence of blow holes
Electrodes are consumed fast
Separate filler rod is needed
Bare electrodes are necessary
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Requires no flux
Uses consumable electrodes
Provides complete protection from atmospheric contamination
Requires no post-weld cleansing
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Two are used at a time
Arc is in the shape of a fan
Ac supply is used
it is a non-pressure process
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Thickness of weld lead
Rate of metal deposit
Slag bath-temperature
Rate of slag consumption
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Ac supply
DCSP
Electrode-negative
DCRP
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Prevent atmospheric contamination
Improve bead quality
Cleanse the base metal
Provide shieding to weld pool
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