1.Which type of ladder is recommended when working near potential electrical hazards?
1.在可能存在电气危险的环境附近工作时，推荐使用哪种类型的梯子？
2.Operator certification is required for cranes with a rated lifting capacity of at least how many tons?
2.额定起重能力达到至少多少吨的起重机，必须要求操作员取得认证？
3.What is the maximum allowable length of a three-section metal extension ladder?
3.三节金属伸缩梯的最大允许长度是多少？
4.For scaffold platforms that are 10 feet or longer, the platform end should not extend beyond the support by more than:
4.对于长度达到10英尺或以上的脚手架工作平台，平台端部伸出支撑点的最大距离不得超过：
5.For bridges or walkways crossing excavations and trenches, fall protection is required when the excavation depth reaches:
5.跨越开挖区域或沟槽的桥梁、通道需要设置防坠落保护时，开挖深度达到多少时必须采取措施？
6.According to Underground Service Alert (811) color identification, what do green stakes or green markings indicate?
6.根据地下设施警报系统（811）的颜色标识，绿色木桩或绿色标记表示什么？
7.An access or exit ladder, stairway, or ramp is required when a trench reaches a depth of:
7.当沟槽开挖深度达到多少时，必须设置进入或撤离用的梯子、楼梯或坡道？
8.Safety nets used for fall protection must extend beyond the edge of the work surface by at least:
8.用于防坠落保护的安全网，必须至少延伸超过工作面边缘多少距离？
9.When a scaffold is installed near an insulated electrical power line carrying less than 300 volts, the minimum required clearance distance is:
9.当脚手架安装在距离低于300伏的绝缘电力线路附近时，要求保持的最小安全距离是多少？
10.According to Cal/OSHA noise exposure requirements, when must an employee use hearing protection such as earmuffs or earplugs?
10.根据Cal/OSHA噪声暴露要求，员工在什么情况下必须使用耳罩或耳塞等听力保护设备？
