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Free Exam: Phase 111 Comprehensive Final

Number of Questions in Test: 462
Number of Questions in Preview: 5
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Question 1

A Plasma cutter works on all electrically non-conductive metals.

Type: True/False
Points: 1

Question 2

AC stick and AC wire feed welding is least desirable because the arc is very erratic and unstable due to the current switching from positive to negative.

Type: True/False
Points: 1

Question 3

DC is created by converting AC current into DC current. DC is the much-preferred type of current to use for welding because the arc is very rough and unstable with minimal spatter of the filler metal.

Type: True/False
Points: 1

Question 4


Shielding gas is a mix of 75% Argon and 25% CO2 (C-25), 100% straight Argon for aluminum, and a mixture of Argon, CO2, and helium for stainless steel (also called "tri-mix").

Type: True/False
Points: 1

Question 5

Flux is a material included in a welding stick or fluxcored wire that gives off a gas when it burns and this gas serves to shield the welding arc.

Type: True/False
Points: 1

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