单项选择题
A safety outlet is provided on the CO2 discharge piping to prevent（）.
A.over pressurization of the space being flooded B.rupture of cylinder due to temperature increase C.over pressurization of the CO2 discharge piping D.flooding of a space where personnel are present
单项选择题 A fire in the galley ALWAYS poses the additional threat of（）.
单项选择题 A fire in a ballast pumproom can be brought under control with minimal impact on stability by（）.
单项选择题 A fifteen-pound CO2 extinguisher（）.
