1.When installing a freestanding sign, why must the footing be properly sized and constructed? 1.安装独立式招牌（Freestanding Sign）时，为什么基础（Footing）必须具有正确的尺寸并按照要求施工？

A. To improve the color of the sign A. 改善招牌的颜色

B. To reduce the sign\'s visibility B. 降低招牌的可见度

C. To increase electrical voltage C. 提高电气电压

D. To resist the structural loads imposed on the sign including wind loads D. 抵抗招牌所承受的结构荷载，包括风荷载

2.What type of fastening method should be used when attaching a building sign to a structural substrate? 2.将建筑物招牌固定到结构基层（Structural Substrate）上时，应采用哪种固定方式？

A. Any available fastener A. 任何可用的紧固件

B. Fasteners appropriate for the substrate and the required structural loads B. 根据基层材料和所需结构荷载，选择合适的紧固件

C. Adhesive tape only C. 仅使用胶带

D. Temporary wire only D. 仅使用临时钢丝

3.What is the purpose of grounding an electrically powered sign? 3.对电力驱动的招牌进行接地（Grounding）的目的是什么？

A. To provide a safe path for fault current and reduce the risk of electric shock A. 为故障电流提供安全的电流路径，并降低触电风险

B. To increase lamp brightness B. 提高灯具亮度

C. To reduce the sign\'s weight C. 减轻招牌重量

D. To eliminate circuit protection D. 消除电路保护装置的需要

4.After completing the electrical connections, what should be done before placing the sign into normal service? 4.成电气连接后，在招牌投入正常使用之前，应进行什么操作？

A. Immediately cover all electrical components A. 立即将所有电气部件覆盖起来

B. Disconnect the grounding conductor B. 断开接地导线

C. Inspect and test the electrical system for proper operation and safe connections C. 检查并测试电气系统，确认其正常运行且连接安全可靠

D. Remove all circuit protection D. 拆除所有电路保护装置

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