单项选择题
Automatic fire dampers in ventilation systems are operated by a（）.
A.remote operated valve B.fusible link C.CO2 system pressure switch D.heat or smoke detector
单项选择题 According to the T-Boat regulations the reason for providing adequate ventilation for a battery storage area is to prevent（）.
单项选择题 A fire starting by spontaneous combustion can be expected in which condition?（）.
单项选择题 A fire pump may be used for other purposes if（）.
