1.Which items can be used as warning lines during roof work?
1.屋顶作业的警告线可包括：
2.DOSH permits required for:
2.DOSH 许可适用于：
3.Personal Protective Equipment (PPE) is considered the last line of defense after the failure of which measures?
3.在以下哪些措施失效后，个人防护装备（PPE）被视为最后一道防线？
4.Max height for step ladder?
4.梯子的最大高度是多少？
5.Not a fire extinguisher type:
5.以下哪项不属于灭火器类型？
6.Scaffold permit is required when the scaffold reaches how many stories?
6.脚手架达到多少层时需要申请许可证？
7.Body belts as fall arrest system?
7.安全带可作为防坠落系统吗？
8.DOSH role:
8.DOSH 的职责是：
9.Which types of cranes require permits?
9.哪些类型的起重机需要申请许可？
10.What is the required load capacity factor for scaffolds?
10.脚手架的承载能力要求是多少倍工作载荷？
