Free Exam: Phase 111 Comprehensive Final
Number of Questions in Test: 462
Number of Questions in Preview: 5
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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
[img]http://mule.ssc.tsc/pls/portal/docs/PAGE/THEMULE/DEPARTMENTS_PAGE/HR_PAGE/TRAINING_EDUCATION/OPERATIONS_TRAINING_AND_EDUCATION_PAGE/TEAM_MEMBER_TRAINING_PAGE/FRONT_PAGE_TRAINING_NEWS_ARCHIVES_PAGE/SHIELDING%20GAS%20BOTTLE.JPG[/img]
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").
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 |