1.What should be inspected when maintaining an illuminated sign cabinet? 1.维护发光招牌箱体（Sign Cabinet）时，应检查哪些部件？

A. Only the foundation A. 仅检查基础

B. Only the cabinet color B. 仅检查箱体颜色

C. Only the sign\'s lettering C. 仅检查招牌文字

D. Lamps or LED modules wiring connections power supplies and internal components D. 灯具或 LED 模块、电线、连接部件、电源以及内部组件

2.What is a common maintenance concern with fluorescent sign lighting? 2.荧光灯招牌照明常见的维护问题是什么？

A. Excessive concrete strength A. 混凝土强度过高

B. Failed lamps ballast problems and deteriorated electrical connections B. 灯管故障、镇流器问题以及电气连接老化或损坏

C. Incorrect foundation depth C. 基础深度不正确

D. Damaged lettering patterns only D. 仅文字图案损坏

3.What should be checked when replacing a failed lamp in an illuminated sign? 3.更换发光招牌中损坏的灯具时，应检查什么？

A. The replacement lamp should be compatible with the sign\'s electrical system A. 更换的灯具必须与招牌的电气系统兼容

B. The lamp should always have a higher voltage rating B. 灯具必须始终具有更高的额定电压

C. Any lamp can be installed regardless of specifications C. 无论规格如何，任何灯具都可以安装

D. The ballast should always be removed D. 必须始终拆除镇流器

4.Why should LED power supplies be inspected during sign maintenance? 4.为什么在招牌维护过程中应检查 LED 电源？

A. Power supplies control the sign\'s structural height A. 电源决定招牌的结构高度

B. Power supplies determine the sign\'s foundation size B. 电源决定招牌基础的尺寸

C. A defective power supply can cause partial or complete LED failure C. 有故障的电源可能导致 LED 部分或全部失效

D. Power supplies eliminate the need for grounding D. 电源可以免除接地的需要

5.What is an important maintenance consideration for outdoor sign enclosures? 5.户外招牌外壳维护时，一个重要的检查事项是什么？

A. Inspecting seals and openings for moisture intrusion A. 检查密封处和开口，防止水分进入

B. Removing all seals B. 拆除所有密封件

C. Leaving electrical components exposed C. 让电气部件裸露在外

D. Increasing the number of openings without consideration D. 不考虑实际情况而增加开口数量

6.What should be done with a sign component that is severely damaged and cannot be safely repaired? 6.对于严重损坏且无法安全修复的招牌部件，应如何处理？

A. Continue using it until it fails completely A. 继续使用，直到其完全失效

B. Replace it with a suitable component B. 用合适的部件进行更换

C. Bypass it permanently C. 永久绕过该部件

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

7.Why should maintenance records be kept for sign equipment? 7.为什么应保存招牌设备的维护记录？

A. They replace the need for testing A. 维护记录可以代替测试

B. They increase the electrical voltage B. 增加电路电压

C. They eliminate future maintenance C. 消除未来的维护需求

D. They help track inspections repairs recurring problems and component replacement D. 有助于跟踪检查、维修、反复出现的问题以及部件更换情况

8.Which tool is commonly used to measure electrical voltage, current, and resistance? 8.哪种工具通常用于测量电压、电流和电阻？

A. Multimeter A. 万用表

B. Hammer B. 锤子

C. Level C. 水平仪

D. Utility knife D. 美工刀

9.What is the primary purpose of a clamp meter? 9.钳形表（Clamp Meter）的主要用途是什么？

A. To measure electrical current without directly disconnecting the conductor A. 无需直接断开导线即可测量电流

B. To cut metal sign faces B. 切割金属招牌面板

C. To measure concrete strength C. 测量混凝土强度

D. To level a sign cabinet D. 调整招牌箱体的水平度

10.What is a voltage tester primarily used for? 10.电压测试仪（Voltage Tester）的主要用途是什么？

A. Tightening anchor bolts A. 拧紧锚栓

B. Measuring the sign\'s physical dimensions B. 测量招牌的实际尺寸

C. Cutting conduit C. 切割导管

D. Determining whether electrical voltage is present D. 判断是否存在电压

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