1.An 80-watt bulb operates for 9 hours on a 120-volt circuit. How many watt-hours are consumed?
1.一个 80 瓦的灯泡在 120 伏的电路中运行了 9 小时。共消耗了多少瓦时（watt-hours）的电能？
2.Smoke detectors in a home should be installed in:
2.家用烟雾探测器应安装在：
3.Using an extension ladder to reach a 2nd-floor landing, it must extend above the landing by:
3.使用伸缩梯攀登至二楼平台时，梯子顶部必须超出平台的高度为：
4.Which tool is used to grip, bend, and cut electrical wire?
4.哪种工具用于夹持、弯曲和剪切电线？
5.A building needs 120/208 V, 400-amp service with 480 V available. Choose the transformer:
5.某建筑物需要 120/208 V、400 安培的供电服务，且现场有 480 V 电源可用。请选择合适的变压器：
6.Max allowed load on a 20-amp branch for a garbage disposal is:
6.连接垃圾处理器（Garbage disposal）的 20 安培支路，其允许的最大负载为：
7.Based on the diagram, how is the photovoltaic (PV) array wired?
7.根据图示，该光伏（PV）阵列是如何接线的？
8.A 208Y/120 V service is most commonly found in:
8.208Y/120 V 的供电制式最常用于：
9.To upgrade service from 100 to 200 amps, an electrician must:
9.若要将供电容量从 100 安培升级至 200 安培，电工必须：
10.An AC circuit operates at 480 volts and draws 8 amps. A wattmeter shows 1,400 watts. What is the circuit’s power factor?
10.某交流电路工作电压为 480 伏，电流为 8 安培。瓦特计读数为 1,400 瓦。请问该电路的功率因数是多少？
