1.Carbon Dioxide (CO2) extinguishers are mainly rated for which fire class?
1.二氧化碳 (CO2) 灭火器主要适用于哪类火灾？
2.What is the smallest grounding conductor allowed for coaxial cable?
2.同轴电缆允许使用的最小接地导体规格是多少？
3.When running low-voltage cable without conduit, what is the maximum support spacing to prevent sag?
3.在不使用导管的情况下敷设低压电缆时，为防止下垂，最大支撑间距是多少？
4.For a two-section ladder up to 36 ft, what is the minimum overlap?
4.对于长度不超过 36 英尺的两节梯子，最小重叠长度是多少？
5.What is the max length of unlisted outdoor gel-filled or water-blocked cable entering a building?
5.未经认证的室外凝胶填充或防水电缆进入建筑物内的最大长度是多少？
6.If a power tool on a job site becomes faulty, what is the correct procedure to prevent use and allow for repair?
6.如果工地上的电动工具出现故障，正确的操作程序是什么，以防止使用并进行维修？
7.A technician is about to work on an aerial coaxial cable. What is the first and most essential safety step before cutting the cable?
7.一名技术人员即将对架空同轴电缆进行作业。在切割电缆之前，第一个也是最重要的安全步骤是什么？
8.On a portable ladder, what safety information is usually displayed via a color label or duty rating classification?
8.在便携式梯子上，通常通过颜色标签或负载等级分类显示哪些安全信息？
9.In a commercial building, the management office and restroom are separated by a Type-X fire-rated gypsum wall that extends above the suspended ceiling to the metal roof. If a low-voltage installer need
9.在商业建筑中，管理办公室和洗手间之间由一块Type-X防火石膏板墙隔开，该墙体延伸至吊顶上方直至金属屋顶。如果低压电缆安装人员需要在这些房间之间布线，需要考虑哪些因素？
10.A low-voltage installer finds a missing or improperly installed demarcation point at a customer site. What is the correct first action?
10.低压电缆安装人员在客户现场发现分界点缺失或安装不正确。正确的首要措施是什么？
