1.For reinforced concrete pipe (RCP), what is the maximum allowable spacing of deformed circumferential reinforcement (rings, stirrups, or spacers)? 1.对于钢筋混凝土管（RCP），变形环向钢筋（环筋、箍筋或间隔件）的最大允许间距是多少？

A. 14\" A. 14\"

B. 12\" B. 12\"

C. 16\" C. 16\"

D. 18\" D. 18\"

2.HDPE compounds used in manufacturing corrugated polyethylene pipe and fittings shall contain what percentage of uniformly dispersed carbon black? 2.用于制造波纹聚乙烯管（Corrugated Polyethylene Pipe）及管件的 HDPE 材料中，应含有多少比例均匀分散的炭黑？

A. 1%–3% A. 1%–3%

B. 2%–3% B. 2%–3%

C. 2%–4% C. 2%–4%

D. 3%–5% D. 3%–5%

3.Why should the interior surface of a water or drainage pipeline be kept clean and smooth during installation? 3.为什么安装过程中必须保持给水管或排水管内部表面清洁、光滑？

A. To maintain the designed flow capacity A. 保持设计流量能力

B. To reduce hydraulic head loss B. 降低水力损失

C. To minimize the potential for clogging C. 减少堵塞可能性

D. All of the above D. 以上全部

4.The magnitude of earth pressure acting on a shoring system depends on which of the following factors? 4.作用于支护系统上的土压力大小取决于以下哪些因素？

A. Soil unit weight A. 土体单位重量

B. Groundwater level B. 地下水位

C. Surcharge loading adjacent to the excavation C. 开挖附近的附加荷载

D. All of the above D. 以上全部

5.When installing a hydraulic shoring system, how should the hydraulic cylinders be positioned above the trench bottom? 5.安装液压支撑系统（Hydraulic Shoring System）时，液压缸应如何设置在沟槽底部上方？

A. High enough to allow the pipe installation crew to safely work beneath the hydraulic cylinders A. 高度应足够，使管道安装人员能够安全地在液压缸下方施工

B. High enough to prevent the pipe from contacting the shoring B. 高度应足够，防止管道接触支护系统

C. High enough to provide access to the quick-connect coupler C. 高度应足够，方便快速连接接头操作

D. High enough to allow placement of the initial backfill D. 高度应足够，方便进行初始回填

6.During horizontal directional drilling (HDD), the borehole is reamed and then filled with a bentonite slurry. What is the primary purpose of the bentonite slurry? 6.在水平定向钻进（HDD）过程中，钻孔扩孔后会注入膨润土泥浆，其主要作用是什么？

A. To stabilize the borehole walls during drilling A. 在钻进过程中稳定孔壁

B. To provide a temporary driving surface B. 提供临时施工表面

C. To eliminate underground tree roots C. 清除地下树根

D. To repel groundwater D. 排斥地下水

7.A gravity-flow water pipeline should be installed with its slope oriented: 7.重力流给水管道安装时，其坡度方向应为：

A. Upward A. 向上

B. Downward B. 向下

C. From north to south C. 从北向南

D. None of the above D. 以上都不是

8.Horizontal subsurface drainage systems are typically constructed using Schedule 80 polyvinyl chloride (PVC) pipes with what diameter? 8.水平地下排水系统通常采用 Schedule 80 PVC 管，其管径是多少？

A. 1-1/2\" A. 1-1/2\"

B. 2\" B. 2\"

C. 2-1/2\" C. 2-1/2\"

D. 3\" D. 3\"

9.During tunneling operations, is excavation allowed to extend beyond the protective shield edge? 9.在隧道施工过程中，开挖范围是否允许超过防护盾（Protective Shield）的边缘？

A. No A. 不允许

B. Yes B. 允许

C. Only with engineer approval C. 仅在工程师批准后允许

D. Cannot be determined D. 无法确定

10.When using aluminum hydraulic shoring systems, what is the minimum required plywood thickness used with the shoring panels? 10.使用铝制液压支护系统（Aluminum Hydraulic Shoring System）时，与支护板配合使用的胶合板最小厚度是多少？

A. 1 inch A. 1 英寸

B. 1-1/2 inches B. 1-1/2 英寸

C. 1-1/8 inches C. 1-1/8 英寸

D. 1-3/4 inches D. 1-3/4 英寸

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