油库火灾和爆炸的原因有哪些?
参考答案:
麻痹大意,不遵守章程;明火、金属撞击火花、设备故障过热、静电、雷电、可燃烧物、库外火源
《焊工考核细则》中摩擦焊焊接方法代号为()
A.EGW
B.PAW
C.ESW
D.FRW
Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by().
A.closing the compartment except for the ventilators
B.completely closing the compartment
C.leaving the compartment open to the air
D.increasing the air flow to the compartment by blowers