1.What color tape marks hazardous areas?
1.什么颜色的胶带标记危险区域？
2.Scaffold safety regulations are published in:
2.脚手架安全规范公布于哪份文件？
3.Safe distance for mechanical excavators from utility paint marks?
3.机械挖掘机与公共设施油漆标记的安全距离是多少？
4.How often should the safety valve on a portable air compressor be checked?
4.便携式空气压缩机的安全阀多久检查一次？
5.What is the maximum height for a retaining wall without a structural engineer?
5.无需结构工程师设计的挡土墙最大高度是多少？
6.What is the proper handrail height for a stairway per UBC?
6.根据 UBC，楼梯扶手的适当高度是多少？
7.Why should long hair be tied back on a jobsite?
7.工地上为什么要把长发扎起来？
8.Handrail height for a handicap ramp should be:
8.无障碍坡道的扶手高度应为：
9.Where must smoke detectors be installed in a $1000+ remodel?
9.装修费用超过 1000 美元时，烟雾探测器必须安装在何处？
10.What to do with unused materials?
10.如何处理未使用的材料？
