AG Mechanics CDE Practice Exam

A 20% duty cycle welder should weld only how many minutes out of every hour at full capacity?

1. 10 minutes

2. 20 minutes

3. 12 minutes

4. 15 minutes

The correct answer is: 10 minutes

A 20% duty cycle welder means that it can operate at full capacity for 20% of the time and needs to cool down for the remaining 80% of the time to prevent overheating. To calculate how many minutes out of every hour the welder should be operating at full capacity, we simply need to find 20% of 60 minutes (since there are 60 minutes in an hour). 20% of 60 minutes = 0.20 x 60 = 12 minutes Therefore, the welder should weld only 12 minutes out of every hour at full capacity. Option C (12 minutes) is the correct answer as it represents the correct calculation for the welder's duty cycle.