Questions and Answers
In GMAW there are four modes of metal transfer, they are ? - Correct answer-Short
circuit, globular, pulsed spray and spray
The type of metal transfer depends on several factors, including? - Correct answer-
Shielding gas, current and voltage levels, type of power source.
List the four types of transfer from hottest to coldest. - Correct answer-Globular,
spray, pulsed spray, short circuit.
List the four parts of the GMAW pulsed wave form - Correct answer-Peak current,
background current, pulse duration, pulse frequency
____________ is best for heavier sections and full penetration weld joints as long
as they can be positioned in __________ or __________. - Correct answer-Spray
transfer & flat or horizontal position
_________ polarity is most commonly used for spray and pulsed spray transfer. -
Correct answer-DCEP
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, A _______ power source is used for spray and pulsed-spray transfer. - Correct
answer-DC/CV
__________ provides almost as much heating as ___________ but it's operating
characteristics tend to be less stable, resulting in increased spatter. - Correct
answer-Globular & spray transfer
Pulsed spray transfer requires a special Welding power source capable of
producing ______________ which allows the welder to program a combination of
high and low currents for _______________ and _________________. - Correct
answer-Pulsed current, improved heat control, process flexibility
__________ results in the least amount of heating to the base metal making it an
excellent choice for Welding _________ and joints with _____________. - Correct
answer-Short circuit, sheet metal, poor fit up
In some GMAW-P equipment all welding parameters are controlled with one dial
this type of equipment is called ____________ control - Correct answer-Synergic
75% argon - 25% CO2 gas will not allow a spray transfer.The percentage of argon
in the gas mixture must be at least _________ for a spray or pulse spray transfer to
occur. - Correct answer-80%
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