Q. According to ASTM E709-95 and API, when fluorescent particles are used, the UVbulb shall warm up prior to use for at least: (Solved)
1. 1 minute
2. 2 minutes
3. 3 minutes
4. 5 minutes
- d. 5 minutes
1. 1 minute
2. 2 minutes
3. 3 minutes
4. 5 minutes