Question 428General Subjects - Assistant Engineer

The correct answer is B) dissipating the heat of a flame. Flame screens installed on sewage system tank vents are designed to prevent explosions by dissipating the heat of a flame, rather than allowing the escape of flammable vapors, absorbing vapors, or preventing vapors from entering the tank. The flame screen acts as a heat sink, absorbing the energy of a flame and preventing it from reaching the flammable vapors inside the tank. This effectively extinguishes the flame and prevents an explosion from occurring. The other answer choices do not accurately describe the primary function of the flame screen in this application.