1. What is the primary advantage of fiber optic communication over traditional copper cables?
- A) Higher signal attenuation
- B) Greater bandwidth and faster data transmission
- C) Easier to install and maintain
- D) Increased electromagnetic interference
Answer: B) Greater bandwidth and faster data transmission
2. What is the core of an optical fiber made of?
- A) Plastic or metal
- B) Copper
- C) Glass or plastic
- D) Carbon
Answer: C) Glass or plastic
3. What is the principle behind fiber optic communication?
- A) Total internal reflection of light
- B) Diffusion of light waves
- C) Reflection of radio waves
- D) Electrical signal conduction
Answer: A) Total internal reflection of light
4. Which type of optical fiber has a core diameter of approximately 8-10 microns?
- A) Single-mode fiber
- B) Multi-mode fiber
- C) Step-index fiber
- D) Graded-index fiber
Answer: A) Single-mode fiber
5. What is the primary cause of signal loss in optical fibers?
- A) Electromagnetic interference
- B) Attenuation and dispersion
- C) Signal reflection
- D) Heat generation
Answer: B) Attenuation and dispersion
6. What is the purpose of the cladding in an optical fiber?
- A) To conduct light signals
- B) To provide mechanical strength
- C) To reflect light back into the core
- D) To absorb stray light
Answer: C) To reflect light back into the core
7. Which light source is commonly used in fiber optic communication?
- A) Fluorescent lamp
- B) Light Emitting Diode (LED)
- C) Laser Diode
- D) Halogen lamp
Answer: C) Laser Diode
8. What is the typical wavelength of light used in fiber optic communication?
- A) 400-500 nm
- B) 600-700 nm
- C) 850 nm, 1310 nm, and 1550 nm
- D) 2000 nm
Answer: C) 850 nm, 1310 nm, and 1550 nm
9. What is dispersion in fiber optic communication?
- A) The scattering of light
- B) The spreading of light pulses over time
- C) The reflection of light signals
- D) The loss of signal intensity
Answer: B) The spreading of light pulses over time
10. Which component converts electrical signals into light signals in fiber optic systems?
- A) Transceiver
- B) Photodetector
- C) Optical transmitter
- D) Optical coupler
Answer: C) Optical transmitter
11. Which of the following is NOT a common material used in fiber optic cables?
- A) Plastic
- B) Glass
- C) Copper
- D) Kevlar
Answer: C) Copper
12. What does WDM stand for in fiber optic communication?
- A) Wide Data Modulation
- B) Wavelength Division Multiplexing
- C) Wireless Data Management
- D) Waveform Displacement Modulation
Answer: B) Wavelength Division Multiplexing
13. What is the role of an Optical Amplifier in fiber optic communication?
- A) To convert optical signals to electrical signals
- B) To increase the strength of optical signals without conversion
- C) To decrease signal attenuation
- D) To split optical signals into multiple channels
Answer: B) To increase the strength of optical signals without conversion
14. Which of the following is a disadvantage of fiber optic communication?
- A) High bandwidth
- B) Immunity to electromagnetic interference
- C) High initial installation cost
- D) Low signal attenuation
Answer: C) High initial installation cost
15. What is the term for the bending of light away from its path in fiber optics due to impurities?
- A) Scattering
- B) Dispersion
- C) Reflection
- D) Refraction
Answer: A) Scattering
