Construction Coordinator Practice Exam

What is the range of Velocity of Propagation (VOP) factors for broadband coaxial cable?

1. 0.50 to 0.70

2. 0.70 to 0.80

3. 0.78 to 0.93

4. 0.90 to 1.00

The correct answer is: 0.78 to 0.93

The choice of the range of Velocity of Propagation (VOP) factors for broadband coaxial cable is significant because it directly relates to how efficiently signals can travel through the cable. Broadband coaxial cable, commonly used in telecommunications and cable television, has a VOP typically ranging from 0.78 to 0.93. This means that signals in a coaxial cable can travel at 78% to 93% of the speed of light in a vacuum. This range indicates the effectiveness of the coaxial cable in maintaining signal integrity over distances while minimizing delays and attenuation, which is crucial for high-frequency transmission typically utilized in broadband applications. The VOP factor is influenced by the cable's insulation material and design, which helps protect against external interference. Options outside of the range of 0.78 to 0.93 either indicate significantly lower speeds, which are not characteristic of contemporary broadband coaxial cables, or suggest unrealistic propagation speeds that exceed the speed of light in a vacuum, which is physically impossible. Thus, the selected range accurately reflects the performance expectations for broadband coaxial cable regarding the speed at which data can be transmitted, reinforcing its suitability for high-speed and high-frequency applications.