NOCTI Welding Test Questions & Answers - Complete Welding Exam Study Guide & Practice Test

NOCTI Welding Test Questions & Answers |
Complete Welding Exam Study Guide &
Practice Test
Question 1
Inadequate gas flow can cause what defect in GMAW welding?
Correct Answer
Porosity



Question 2
GMAW is generally done with what polarity?

Correct Answer
Direct current electrode positive (DC+)



Question 3
Why is DC+ polarity not commonly used in GTAW
Correct Answer
Overheating of tungsten can occur



Question 4
GTAW of magnesium is done using what polarity
Correct Answer
AC



Question 5
What does E stand for in ER70S-6
Correct Answer
electrode




Page 1 of 50

,Question 6
When using GTAW what is the proper torch angle to be used for most applications
Correct Answer
Determines weld bead shape



Question 7
A consumable isn't he GTAW process would include
Correct Answer
Filler rods



Question 8
The same style cutting tip is used for both natural gas
Correct Answer
Propane



Question 9
What converts AC input current into DC current
Correct Answer
Rectifier



Question 10
In SMAW welding, what does "Hot Start" do
Correct Answer
Provides an additional boost of current when striking the arc



Question 11
When using GTAW what is not an advantage
Correct Answer
Excellent outdoor welding capability




Page 2 of 50

,Question 12
Not an advantage of adding helium to argon for a shielding gas
Correct Answer
Lower gas flow rates



Question 13
Which of the following gases is not an inert gas
Correct Answer
Carbon Dioxide



Question 14
GTAW of magnesium is done using what polarity?
Correct Answer
AC



Question 15
What type of technology is most commonly found on GTAW machines for AC welding
Correct Answer
Square wave technology



Question 16
Electrodes used for CAC-A are made of carbon or
Correct Answer
Graphite



Question 17
What does GTAW stand for?
Correct Answer
Gas Tungsten Arc Welding




Page 3 of 50

, Question 18
What is the proper type of power source for GTAW
Correct Answer
constant current



Question 19
Which is f the following GTAW accessories does not allow for remote current control
Correct Answer
Arc start switch



Question 20
What position should the Hugh frequency control be in for GTAW or f stainless steel
Correct Answer
Starts only



Question 21
What gas mixture is generally associated with spray transfer on steel?
Correct Answer
80% AR/ 20% CO2



Question 22
What does "70" stand for in ER70S-3?
Correct Answer
tensile strength



Question 23
What is not a function of inert shielding gas for GTAW of aluminum
Correct Answer
Cleans the oxides off stainless steels




Page 4 of 50