1.Which sign-lighting transformer requires midpoint grounding when it has a metal enclosure? 1.当招牌照明变压器具有金属外壳时，哪种变压器需要进行中点接地（Midpoint Grounding）？

A. 4000 volts A. 4000 伏

B. 6000 volts B. 6000 伏

C. 7500 volts C. 7500 伏

D. 15000 volts D. 15000 伏

2.Which requirement applies when installing a ballast, transformer, LED driver, or power supply? 2.安装镇流器、变压器、LED 驱动器或电源时，应满足以下哪项要求？

A. Secondary connections must be insulated with at least five layers of electrical tape A. 次级连接必须使用至少五层电工绝缘胶带进行绝缘

B. Secondary connections should be kept as short as practicable B. 次级连接应尽可能保持较短

C. Only copper conductors may be used for secondary connections C. 次级连接只能使用铜导线

D. All secondary connections must be installed inside conduit D. 所有次级连接必须安装在导管内

3.Which wiring practice represents professional-grade installation of an electrical sign? 3.以下哪种布线方式代表电气招牌的专业级安装？

A. Conductors should be routed as straight and as short as practicable A. 导线应尽可能保持笔直且短

B. Conductors should be installed as long and curved as possible B. 导线应尽可能安装得又长又弯曲

C. Conductors should cross from one side of the sign enclosure to the other at equal lengths C. 导线应以相同长度从招牌外壳的一侧穿到另一侧

D. Any type of wire may be used regardless of its rating D. 无论额定规格如何，都可以使用任何类型的电线

4.Which connection should be provided during pre-wiring for the installation of an exterior LED sign? 4.在安装户外 LED 招牌进行预布线（Pre-Wiring）时，应预留哪种连接？

A. A low-voltage electrical power cable routed to the sign location A. 将低压电源电缆敷设至招牌安装位置

B. A data-cable connection directly to the server B. 直接连接到服务器的数据电缆

C. A water-supply connection to the sign foundation C. 连接至招牌基础的供水管线

D. A drainage connection beneath the sign foundation D. 招牌基础下方的排水连接

5.What is the primary purpose of prewiring electrical components before installing a sign? 5.安装招牌之前，对电气元件进行预布线（Prewiring）的主要目的是什么？

A. To eliminate the need for electrical testing A. 消除电气测试的需要

B. To simplify installation and verify electrical components before final installation B. 简化安装过程，并在最终安装前检查和确认电气元件

C. To increase the structural weight of the sign C. 增加招牌的结构重量

D. To eliminate the need for grounding D. 消除接地的需要

6.Before prewiring a sign, what should be verified first? 6.在对招牌进行预布线之前，首先应确认什么？

A. The color of the building A. 建筑物的颜色

B. The electrical requirements component ratings and wiring configuration B. 电气要求、元件额定值以及布线配置

C. The landscaping around the sign C. 招牌周围的景观

D. The advertising content D. 广告内容

7.Why should electrical wiring be protected from physical damage during sign installation? 7.为什么在招牌安装过程中必须防止电线受到物理损坏？

A. To improve the appearance of the sign only A. 仅为了改善招牌外观

B. To eliminate the need for circuit protection B. 消除电路保护的需要

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

D. To prevent damage that could create electrical hazards or equipment failure D. 防止因电线损坏而产生电气危险或设备故障

8.What is a primary purpose of an excavation for a freestanding sign? 8.独立式招牌（Freestanding Sign）开挖基础的主要目的是什么？

A. To provide space for advertising materials A. 为广告材料提供空间

B. To create the required foundation for supporting the sign structure B. 为支撑招牌结构建造所需的基础

C. To reduce the height of the sign C. 降低招牌高度

D. To provide access to the sign face D. 提供通往招牌表面的通道

9.Before placing concrete for a sign footing, what should be verified? 9.在为招牌基础浇筑混凝土之前，应确认什么？

A. Excavation dimensions location reinforcement and required embedment A. 开挖尺寸、位置、钢筋以及规定的埋入深度

B. The sign lettering style B. 招牌字母样式

C. The color of the concrete only C. 仅混凝土的颜色

D. The digital display settings D. 数字显示屏的设置

10.What is the primary function of a concrete footing for a pole sign? 10.柱式招牌（Pole Sign）的混凝土基础（Concrete Footing）的主要作用是什么？

A. To illuminate the sign A. 为招牌提供照明

B. To protect the sign face from sunlight B. 保护招牌表面免受阳光照射

C. To provide electrical power C. 提供电力

D. To transfer structural loads safely into the supporting soil D. 将结构荷载安全地传递到承重土层

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