Heavy Duty Equipment Technician Red Seal Exam Prep · Question
A technician is performing SMAW on a structural component of a mining truck. The material is high-strength low-alloy (HSLA) steel with a thickness requiring good ductility and crack resistance. Which electrode classification is most appropriate, providing enhanced mechanical properties and typically requiring preheat for thicker sections?
E7018 electrodes are low-hydrogen electrodes, offering excellent ductility, impact strength, and crack resistance, making them ideal for high-strength steels an
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Question: A technician is performing SMAW on a structural component of a mining truck. The material is high-strength low-alloy (HSLA) steel with a thickness requiring good ductility and crack resistance. Which electrode classification is most appropriate, providing enhanced mechanical properties and typically requiring preheat for thicker sections?
Answer options:
- E6010 ✅ E7018
- E6013
- E7024
Correct answer: E7018
Explanation: E7018 electrodes are low-hydrogen electrodes, offering excellent ductility, impact strength, and crack resistance, making them ideal for high-strength steels and out-of-position welding where these properties are critical. E6010 and E6013 are general-purpose cellulosic and rutile electrodes respectively, while E7024 is a high-deposition iron powder electrode.
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