Which statement correctly describes Class 2 leakage?

• A. Fluid not great enough to form drops
• B. Fluid great enough to form drops, but not great enough to fall during inspection
• C. Fluid great enough to form drops and drip during inspection
• D. No fluid present

Answer: (B)

The statement reflects how leakage severity is judged by how the liquid behaves during inspection: you look for whether liquid forms droplets at the leak site and whether gravity causes it to drip off. For Class 2 leakage, you can see droplets forming, which shows there is leakage, but the flow isn’t strong enough to keep falling off during the inspection. In other words, droplets appear but there’s no drip. If it formed droplets and then dripped, that would be a higher class; if there’s no droplets or no liquid at all, that would be a lower class or no leakage. So the best description is fluid that forms drops but does not drip during inspection.