211. Which of the following statements pertaining to fire suppression systems is true?

Вариант ответа 1 - A. Soda acid is an effective fire suppression method for class C (electrical) fires.

Вариант ответа 2 - B. CO2 systems are effective because they suppress the oxygen supply required to sustain the fire.

Вариант ответа 3 - C. Gas masks provide an effective protection against use of CO2 systems.

Вариант ответа 4 - D. Halon is commonly used because it is highly effective in the fact that it interferes with the chemical combustion of the elements within a fire.