Question 1074 Deck General

The correct answer is C) 500°F. The minimum temperature required for steam-driven pumps to be considered a source of vapor ignition is 500°F, as per the regulations outlined in the Code of Federal Regulations (CFR) for the US Coast Guard. Specifically, the CFR states that any machinery or equipment that can reach a surface temperature of 500°F or higher must be considered a potential source of vapor ignition. The other options are incorrect because 100°C (212°F) is too low, and 1200°F is significantly higher than the regulatory requirement of 500°F.