1.What is the abbreviation PFAS referring to? 1.PFAS缩写代表什么？

A. Personal Fall Arrest System A. 个人防坠落制动系统

B. Personal Formation Academic System B. 个人培训系统

C. Preferred Fall Acquired System C. 优选坠落获取系统

D. None of the above D. 以上都不是

2.During trench excavation, how far must excavated soil or spoil piles be placed away from the trench edge? 2.沟槽开挖过程中，挖出的土方或弃土堆必须距离沟槽边缘至少多少距离？

A. 2 feet A. 2英尺

B. 4 feet B. 4英尺

C. 1 foot C. 1英尺

D. 6 feet D. 6英尺

3.Who is responsible for supplying required Personal Protective Equipment (PPE) to workers? 3.谁负责向工人提供所需的个人防护装备（PPE）？

A. Employer A. 雇主

B. Employee B. 员工

C. Manufacturer C. 制造商

D. None of the above D. 以上都不是

4.What is the maximum allowable height of a mason’s ladder? 4.砌砖工专用梯（Mason’s Ladder）的最大允许高度是多少？

A. 20 feet A. 20英尺

B. 40 feet B. 40英尺

C. 30 feet C. 30英尺

D. 15 feet D. 15英尺

5.What is the purpose of a trench shoring system? 5.沟槽支护系统（Trench Shoring System）的目的是什么？

A. A workplace safety program required for every employer A. 每个雇主必须制定的工作场所安全计划

B. A protective system using hydraulic mechanical or timber supports to prevent trench wall collapse or cave-ins B. 使用液压、机械或木质支撑组成的防护系统，用于防止沟槽侧壁坍塌或塌方

C. The process of assembling scaffolding structures C. 组装脚手架结构的过程

D. None of the above D. 以上都不是

6.Which of the following characteristics should a construction hard hat have? 6.建筑安全帽应具备以下哪些特性？

A. Attractive appearance for workers A. 外观美观，提升工人形象

B. Water-resistant and slow-burning properties B. 防水并具有缓慢燃烧性能

C. Used as a general-purpose tool C. 作为通用工具使用

D. Hard hats are unnecessary on construction sites D. 建筑工地无需佩戴安全帽

7.When standing on a stepladder, a worker must not stand on the top ___ steps. 7.站在人字梯（Stepladder）上工作时，工人不得站在顶部的多少级踏板上？

A. 1 A. 1

B. 2 B. 2

C. 3 C. 3

D. Any step is acceptable D. 任何一级都可以

8.What is the maximum intended working load capacity of a light-duty scaffold? 8.轻型脚手架（Light-Duty Scaffold）的最大设计工作荷载是多少？

A. 25 pounds per square foot A. 25磅/平方英尺

B. 39 pounds per square foot B. 39磅/平方英尺

C. 50 pounds per square foot C. 50磅/平方英尺

D. 75 pounds per square foot D. 75磅/平方英尺

9.According to NEC and OSHA requirements, flexible cords used in construction may be installed in which situations? 9.根据NEC和OSHA要求，建筑施工中使用的柔性电缆（Flexible Cords）可以安装在哪些情况下？

A. Elevator cables and crane/hoist wiring systems A. 电梯电缆以及起重机/吊车线路系统

B. Fixture wiring systems B. 灯具线路系统

C. Appliances where connections are designed for removal during maintenance or repair C. 设备连接设计为维护或维修时可拆卸的电器设备

D. All of the above D. 以上全部

10.What is the correct procedure for dismantling a scaffold structure? 10.拆除脚手架结构时，正确的操作程序是什么？

A. Begin removal from the bottom upward A. 从底部开始向上拆除

B. Remove scaffold components from the top downward B. 从顶部开始向下拆除脚手架组件

C. Remove components from right to left C. 从右侧向左侧拆除组件

D. None of the above D. 以上都不是

吉象智能为您解答