1.Which color is most often used to identify multimode fiber optic cable? 1.通常用哪种颜色来标识多模光纤电缆？

A. Yellow A. 黄色

B. Orange B. 橙色

C. White C. 白色

D. Green D. 绿色

2.Which wavelengths are most commonly used in fiber optic communications? 2.光纤通信中最常用的波长有哪些？

A. 850 nm A. 850 nm

B. 1310 nm B. 1310 nm

C. 1550 nm C. 1550 nm

D. All of the above D. 以上所有选项

3.Which statement about fiber optic cable construction is correct? 3.关于光纤电缆结构，以下哪项描述是正确的？

A. The jacket traps light A. 护套用于阻挡光线

B. Core and jacket are both optical layers B. 光纤芯和护套都是光学层

C. A plastic primary buffer coating protects the fiber C. 塑料初级缓冲涂层保护光纤

D. The cladding provides mechanical strength D. 包层提供机械强度

4.Which option best defines fiber optic cladding? 4.以下哪个选项最能准确定义光纤包层？

A. Light-guiding strands A. 导光光纤束

B. The central light path B. 中心光路

C. The optical layer that confines light within the core C. 将光线限制在光纤芯内的光学层

D. Strength members D. 加强件

5.Which is true about Plastic Optical Fiber (POF)? 5.关于塑料光纤 (POF)，以下哪项描述是正确的？

A. Has a ~1 mm core; multimode fiber type A. 芯径约为 1 mm；多模光纤类型

B. Main drawback: limited bending/stretch resistance B. 主要缺点：抗弯曲/拉伸性能有限

C. Used in short-distance high-speed networks C. 用于短距离高速网络

D. Used in consumer audio/video systems and automotive networks like MOST D. 用于消费类音频/视频系统和汽车网络（例如 MOST）

6.Common fiber connectors: 6.常见光纤连接器：

A. SC – snap-in widely used for single-mode A. SC – 卡扣式，广泛用于单模光纤

B. LC – small 1.25 mm ferrule half size of ST B. LC – 小型 1.25 mm 插芯，尺寸是 ST 连接器的一半

C. MPO – multi-fiber 12–16 fibers in a row C. MPO – 多芯光纤，12-16 根光纤排列成一行

D. All of the above D. 以上所有选项

7.Main difference between multimode and single-mode fiber: 7.多模光纤和单模光纤的主要区别：

A. Multimode for 1300/1550 nm lasers in telephony/CATV A. 多模光纤用于电话/有线电视中的 1300/1550 nm 激光器

B. Single-mode uses 850/1300 nm LEDs for short distances B. 单模光纤使用 850/1300 nm LED 用于短距离传输

C. Multimode has larger core; single-mode smaller core C. 多模光纤纤芯较大；单模光纤纤芯较小

D. Multimode supports longer distances at higher speeds D. 多模光纤支持更长距离和更高速度的传输

8.Which test instrument is most often used to determine total insertion loss in fiber optic links? 8.哪种测试仪器最常用于确定光纤链路的总插入损耗？

A. Optical Loss Test System (OLTS) A. 光损耗测试系统 (OLTS)

B. Optical Time Domain Reflectometer (OTDR) B. 光时域反射仪 (OTDR)

C. Power deflection meter C. 功率偏转计

D. Volt-Ohm Meter (VOM) D. 万用表 (VOM)

9.Which tool permanently joins two optical fibers using an electric arc? 9.哪种工具使用电弧将两根光纤永久连接起来？

A. Splicer A. 熔接机

B. Fusion splicer B. 熔融熔接机

C. Fusion welder C. 熔焊机

D. Crimper D. 压接工具

10.What is a fiber stripper? 10.什么是光纤剥线器？

A. Tool that removes the buffer coating from the fiber for termination A. 用于去除光纤缓冲层涂层以便进行端接的工具

B. Tool for stripping the outer fiber coating; e.g. “Nik Free” variant B. 用于剥除光纤外层涂层的工具；例如，“Nik Free”型

C. Device to break fiber precisely for splicing/polishing C. 用于精确断开光纤以便进行熔接/抛光的设备

D. Tool to measure buffer thickness D. 用于测量缓冲层厚度的工具

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