1.Minimum lumber size for 5 ft horse scaffolding?
1.5 英尺高马凳式脚手架的最小木材尺寸是？
2.Most important PPE for chainsaw use?
2.使用链锯时最重要的个人防护装备（PPE）是？
3.Ladder base distance ratio to height?
3.梯子底部与高度的距离比例是？
4.When is a DOSH permit required?
4.何时需要 DOSH 许可？
5.When are flagmen necessary?
5.何时需要设置交通指挥员？
6.Where is green board typically used?
6.防潮石膏板（绿板）通常用于何处？
7.Most common roofing accidents involve:
7.最常见的屋面作业事故类型是？
8.Advance notice for digging a 5 ft deep excavation?
8.挖掘 5 英尺深的基坑需提前多久通知？
9.When may a contractor work alone on a roof?
9.承包商何时可以单独在屋顶上工作？
10.Correct statement about rolling scaffolding?
10.关于滚动脚手架的说法正确的是？
