电容器分组不是恰好为6组或12组,如何选择R6、R12?
参考答案:
当电容器分组小于或等于6组时,选择R6;当电容器分组小于等于12并大于6组时,选择R12。
ZD6系列电动转辙机安全接点的作用是检修转辙机或停用转辙机时,切断转辙机的动作条件,以使转辙机无法转换。()
Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?()
A.Insure the chemical is powdery
B.Replace the cartridge
C.Pressure test the discharge hose
D.Test the pressure gauge for proper operation