Welder Red Seal · Question
A welding power source has a rating of 300A at a 60% duty cycle. What does this mean?
Duty cycle is a rating based on a 10-minute period. A 60% duty cycle at 300A means the machine's thermal components can handle operating at 300A for 6 minutes s
Start free practice for Welder Red Seal
154 questions · no signup required · 40 free questions per day
Question: A welding power source has a rating of 300A at a 60% duty cycle. What does this mean?
Answer options:
- The machine can run continuously at 180A (60% of 300A). ✅ In any 10-minute period, the machine can weld at 300A for 6 minutes and must then cool for 4 minutes.
- The machine's maximum output is 300A, but only 60% of the time during an 8-hour shift.
- The machine can operate for 6 minutes at any amperage before requiring a 4-minute rest.
Correct answer: In any 10-minute period, the machine can weld at 300A for 6 minutes and must then cool for 4 minutes.
Explanation: Duty cycle is a rating based on a 10-minute period. A 60% duty cycle at 300A means the machine's thermal components can handle operating at 300A for 6 minutes straight, but then require a 4-minute cooling period to avoid damage.
Start free practice for Welder Red Seal
154 questions · no signup required · 40 free questions per day
More about Welder Red Seal
Related Questions
- A welder is fabricating a pressure vessel component using FCAW-G with an E70T-1 wire. The procedure specifies
- A welder is preparing to weld 20 mm (0.8 in) thick high-strength low-alloy (HSLA) steel using FCAW-G. The weld
- A structural steel fabricator is using FCAW-S (E71T-8 wire) to weld heavy sections of structural steel in an o
- When performing FCAW-G (gas-shielded flux-cored arc welding), a welder notices the arc is unstable and the wir
- A structural welder is performing overhead FCAW-G on 12 mm (0.5 in) thick steel with an E71T-1 wire. The weld
- A welder is setting up an FCAW-S machine for welding in a remote location without access to external shielding
More for Welder Red Seal candidates
Practice tests
Question explanations
- A welder is fabricating a pressure vessel component using FCAW-G with an E70T-1 wire. The procedure specifies
- A welder is preparing to weld 20 mm (0.8 in) thick high-strength low-alloy (HSLA) steel using FCAW-G. The weld
- A structural steel fabricator is using FCAW-S (E71T-8 wire) to weld heavy sections of structural steel in an o
- When performing FCAW-G (gas-shielded flux-cored arc welding), a welder notices the arc is unstable and the wir
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Welder Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.