Question 1
In Shielded Metal Arc Welding (SMAW), what is the primary function of the flux coating on a stick electrode?
Correct Answer:
To shield the molten weld pool from atmospheric oxygen and nitrogen by forming gas and slag
Question 2
In the AWS A5.1 electrode classification E7018, what do the first two digits '70' represent?
Correct Answer:
The minimum tensile strength of the weld deposit in thousands of psi (70 000 psi)
Question 3
An E7018 electrode is described as 'low-hydrogen'. Why must these electrodes be kept dry, often in a heated oven?
Correct Answer:
Absorbed moisture introduces hydrogen into the weld, which can cause cold (hydrogen-induced) cracking
Question 4
Which shielding gas is most commonly used for the GTAW (TIG) welding of aluminium?
Correct Answer:
Pure argon
Question 5
In GMAW (MIG/MAG) welding of carbon steel, what is the role of the consumable wire electrode?
Correct Answer:
It serves as both the electrode carrying the arc and the filler metal added to the joint
Question 1
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Prepare with the SA Welder Trade Test Practice Questions - South Africa Artisan Trade Test - Welder (QCTO NAMB) Exam practice quiz. This question bank includes 100 questions covering welding, steel, weld, metal, and electrode. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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SA Welder Trade Test Practice Questions - South Africa Artisan Trade Test - Welder (QCTO NAMB) Exam

This practice set contains 100 questions from the matching question bank and focuses on welding, steel, weld, metal, and electrode. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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