Halon from extinguishers used on a class B fire,should be directed().
A、at the top of the flames
B、at the base of the fire near the edge
C、in short quick bursts
D、toward the upwind side of the fire
A、at the top of the flames
B、at the base of the fire near the edge
C、in short quick bursts
D、toward the upwind side of the fire
A、可以接受,因为瓶数、重量都没有变 B、可以接受,因为SOLAS公约不允许继续使用Halon C、不可以接受,因为不是原始经过认可的系统 D、不可以接受,因为在自由状态下CO2单位重量的体积和Halon不同,应该按照“消防安全系统规则”重新进行计算,经过认可由方可使用
A、The agent is considered nontoxic at room temperature in low concentrations B、The agent is less effective than carbon dioxide C、Halon primarily extinguishes the fire by cooling D、The agent cannot be used on electrical fires because it leaves a residue