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1.What tool checks if a metal pipe is properly grounded? 1.哪种工具用于检查金属管道是否已正确接地?
2.Which component prevents reverse current in DC-to-AC systems? 2.在直流-交流(DC-to-AC)系统中,哪种元件用于防止反向电流?
3.How many amps of solar backfeed can be added to a 200A panel? 3.在一个 200A 的配电箱中,最多可以接入多少安培的太阳能反向馈电?
4.If three 2A batteries are connected in parallel, what is the total current capacity? 4.如果三节 2A 的电池并联连接,其总电流容量是多少?
5.Where must a disconnecting means be installed? 5.断开装置必须安装在何处?
6.A selective system means: 6.“选择性系统”是指:
7.If current leads voltage in an AC circuit, what is the likely cause? 7.如果在交流电路中电流超前于电压,可能的原因是什么?
8.When inductive and capacitive reactance are equal, what happens if one changes? 8.当感抗与容抗相等时,如果其中一项发生变化,会发生什么情况?
9.OCPD for 17.5A load: 9.针对 17.5A 负载的过电流保护装置(OCPD):
10.Minimum conductor for 9kW range: 10.9kW 电灶所需的最小导线规格:
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