1.How should temporary jobsite power be protected?
1.临时施工现场电源应如何进行防护?
2.While replacing a 20A outlet, you find #14 wire feeding a light on the same circuit. What is the correction?
2.在更换一个 20A 插座时,你发现同一回路上有一根 #14 导线正在给一盏灯供电。正确的整改措施是什么?
3.If current lags voltage in an AC circuit, what is the likely cause?
3.如果在交流电路中电流滞后于电压,可能的原因是什么?
4.In an inductive circuit, adding capacitance will:
4.在感性电路中,增加电容会产生什么效果?
5.What is incorrect in the shown circuit?
5.下图所示电路中,哪一处存在错误?
6.What is the smallest conductor size permitted for a 6kW range?
6.对于一台 6kW 的电灶,允许使用的最小导线规格是多少?
7.What fuse size is required for three #6 THWN aluminum conductors at 30°C?
7.对于在 30°C 环境温度下的三根 #6 THWN 铝导线,需要选用多大额定电流的熔丝?
8.A wattmeter must be connected how in a circuit?
8.瓦特计在电路中必须如何连接?
9.What device extends the measuring range of an ammeter?
9.哪种装置可以扩展安培计的测量范围?
10.Which instrument measures actual (true) power?
10.哪种仪表用于测量实际(真)功率?