Question 1290 Deck General

The correct answer is D) 500°F. Regulations state that steam-driven pumps are considered sources of vapor ignition if the steam temperature is at least 500°F. This is because at temperatures above 500°F, the steam can potentially ignite flammable vapors in the surrounding environment. The other answer choices are incorrect because: A) 212°F is the boiling point of water, which is too low to be considered a source of vapor ignition; B) 1200°F is far too high and not the regulatory threshold; and C) 100°C is equivalent to 212°F, which is also too low.