Fiber Optics Quiz

What is one primary reason single-mode fiber is used over long distances compared to multimode fiber?

• It is cheaper to manufacture.

• It supports more data signals simultaneously.

• It reduces signal loss by allowing only one mode of light to pass.

• It requires fewer connectors to install.

How does the cladding of fiber optics enhance the transmission of light within the core?

• It amplifies the light signal.

• It prevents external light from entering.

• It reflects stray light back into the core.

• It reduces interference from other signals.

What would most likely happen if you used multimode fiber for a 50 km connection?

• The signal would degrade and require retransmission.

• The signal would amplify, resulting in faster speeds.

• The core would overheat from excess light.

• The fiber would fail to support the connection.

Which scenario would be the most appropriate use of multimode fiber?

• Connecting two data centers 80 km apart.

• Linking equipment within a single building over 1 km.

• Establishing submarine communication cables.

• Creating a home network.

What makes fiber optics immune to radio frequency interference (RFI)?

• The use of protective coating over the fiber.

• The transmission of light rather than electrical signals.

• The larger core size of the fiber cable.

• The fiber’s ability to amplify weak signals.

Why are lasers used for single-mode fiber transmission instead of LEDs?

• Lasers are cheaper and more reliable.

• Lasers generate signals across multiple modes.

• Lasers are capable of maintaining stronger signals over long distances.

• LEDs create too much heat for the fiber optic core.

Which problem could occur if connectors are improperly installed on fiber optic cables?

• Electrical interference disrupts the signal.

• Data signals become unintelligible from overlap.

• The light signal escapes the core, causing data loss.

• The core overheats, causing the cable to fail.

What would likely happen if the cladding had the same refractive index as the core?

• Total internal reflection would not occur.

• Light would be confined within the core.

• The optical fiber would function normally.

• The cladding would enhance light transmission.

What would happen if no light remained confined to the core of a fiber optic cable?

• Light would pass through the cable uninterrupted.

• The signal would reflect too much, resulting in interference.

• No light would remain confined to the core, causing the signal to fail.

• Data transfer would be amplified, increasing efficiency.

How would changing the wavelength of the light affect a multimode fiber’s performance?

• It would reduce signal reflections.

• It would alter the modes of light traveling through the fiber.

• It would eliminate the need for cladding.

• It would make the fiber immune to signal degradation.