Question

based on the possible answers below, engine - driven welding machines should be shut down if no welding is planned for more than?
10 minutes
15 minutes
20 minutes
30 minutes

Explanation:

Engine - driven welding machines are typically shut - down if no welding is planned for more than 15 minutes to save fuel and reduce wear. This is a common practice in welding operations for efficiency and resource conservation.

Answer:

B. 15 minutes