1.Before testing an electrical component, what should the technician determine? 1.在测试电气元件之前，技术人员应确定什么？

A. The correct testing procedure and applicable safety precautions A. 正确的测试程序以及适用的安全防护措施

B. The sign\'s advertising message B. 招牌上的广告内容

C. The color of the cabinet C. 招牌箱体的颜色

D. The size of the letters D. 字母的尺寸

2.What is the safest general approach when troubleshooting an energized sign circuit? 2.对带电运行的招牌电路进行故障排查时，最安全的一般做法是什么？

A. Work without protective equipment A. 不使用个人防护装备进行工作

B. Bypass circuit protection B. 绕过电路保护装置

C. Follow electrical safety procedures and use properly rated equipment C. 遵循电气安全操作规程，并使用符合额定要求的测试设备

D. Touch conductors to identify the energized circuit D. 用手触碰导线来判断哪条电路带电

3.What is the primary purpose of preventive maintenance on a sign? 3.对招牌进行预防性维护的主要目的是什么？

A. To eliminate electrical inspections A. 取消电气检查

B. To increase the sign\'s physical size B. 增加招牌的实际尺寸

C. To prevent failures and extend the service life of the sign C. 防止故障并延长招牌的使用寿命

D. To change the sign\'s message D. 更改招牌上的信息

4.How often should sign maintenance generally be performed? 4.通常应多久进行一次招牌维护？

A. Only after a major failure A. 只有发生重大故障后才维护

B. According to the manufacturer\'s recommendations and the sign\'s operating conditions B. 根据制造商的建议以及招牌的运行环境和使用条件进行维护

C. Only when the sign is sold C. 只有出售招牌时才维护

D. Never after installation D. 安装完成后永远不需要维护

5.What should be inspected regularly on an exterior sign? 5.户外招牌应定期检查哪些部位？

A. Structural components fasteners electrical components and sign faces A. 结构部件、紧固件、电气部件以及招牌表面

B. Only the lettering B. 仅检查文字

C. Only the paint color C. 仅检查油漆颜色

D. Only the electrical switch D. 仅检查电气开关

6.Why should sign fasteners be inspected during maintenance? 6.为什么在招牌维护过程中应检查紧固件？

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

B. To increase electrical current B. 增加电流

C. To improve lamp color C. 改善灯具颜色

D. To identify loosening corrosion or damage that could affect structural stability D. 检查是否存在松动、腐蚀或损坏，以免影响结构稳定性

7.What is an indication that a sign may require structural repair? 7.以下哪种情况表明招牌可能需要进行结构维修？

A. Properly tightened fasteners A. 紧固件已正确拧紧

B. Clean lettering B. 文字表面清洁

C. Uniform illumination C. 照明均匀

D. Loose components corrosion cracking deformation or unusual movement D. 部件松动、腐蚀、开裂、变形或出现异常晃动

8.Why should corrosion be addressed promptly on sign structures? 8.为什么发现招牌结构存在腐蚀时应及时处理？

A. Corrosion can weaken structural components and reduce service life A. 腐蚀会削弱结构部件并缩短使用寿命

B. Corrosion increases electrical efficiency B. 腐蚀会提高电气效率

C. Corrosion improves the sign\'s appearance C. 腐蚀会改善招牌外观

D. Corrosion eliminates maintenance requirements D. 腐蚀可以免除维护要求

9.What should be done when damaged electrical wiring is discovered during sign maintenance? 9.在招牌维护过程中发现电线损坏时，应采取什么措施？

A. Leave it exposed A. 任由电线裸露

B. Repair or replace the damaged wiring using an appropriate method B. 使用适当的方法修复或更换损坏的电线

C. Cover it with ordinary paper C. 用普通纸张覆盖电线

D. Increase the circuit voltage D. 提高电路电压

10.Why is cleaning a sign face an important maintenance activity? 10.为什么清洁招牌表面是重要的维护工作？

A. It helps maintain appearance and allows the sign to provide proper visibility and illumination A. 有助于保持招牌外观，并确保招牌具有良好的可见度和照明效果

B. It increases the electrical voltage B. 提高电路电压

C. It strengthens the foundation C. 加固基础

D. It eliminates the need for electrical testing D. 免除电气测试的需要

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