MCQOPTIONS
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MCQOPTIONS
This section includes 23 Mcqs, each offering curated multiple-choice questions to sharpen your Optical Communication knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When the input and output power in an optical fiber is 120μW & 3μW respectively and the length of the fiber is 8 km. What is the signal attenuation per km for the fiber? |
| A. | 3dB/km |
| B. | 2dB/km |
| C. | 1dB/km |
| D. | 4dB/km |
| Answer» C. 1dB/km | |
| 2. |
A decibel may be defined as the ratio of input and output optical power for a particular optical wavelength. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
A device that reduces the intensity of light in optical fiber communications is ___________ |
| A. | compressor |
| B. | Optical attenuator |
| C. | Barometer |
| D. | Reducer |
| Answer» C. Barometer | |
| 4. |
If the input power 100μW is launched into 6 km of fiber, the mean optical power at the fiber output is 2μW. What is the overall signal attenuation through the fiber assuming there are no connectors or splices? |
| A. | 15.23dB |
| B. | 16.98dB |
| C. | 17.12dB |
| D. | 16.62dB |
| Answer» C. 17.12dB | |
| 5. |
The optical fiber incurs a loss in signal power as light travels down the fiber which is called as ___________ |
| A. | Scattering |
| B. | Attenuation |
| C. | Absorption |
| D. | Refraction |
| Answer» C. Absorption | |
| 6. |
Which is the unit of measurement of attenuation in optical fibers? |
| A. | km |
| B. | dB |
| C. | dB/km |
| D. | Coulomb’s |
| Answer» D. Coulomb’s | |
| 7. |
The periodic arrangement of cladding air holes in photonic band gap fibers provides for the formation of a photonic band gap in the ___________ |
| A. | H-plane of fiber |
| B. | E-plane of fiber |
| C. | E-H-plane of fiber |
| D. | Transverse plane of fiber |
| Answer» E. | |
| 8. |
The high index contrast enables the PCF core to be reduced from around 8 μmin conventional fiber to ___________ |
| A. | Less than 1μm |
| B. | More than 5μm |
| C. | More than 3μm |
| D. | More than 2μm |
| Answer» B. More than 5μm | |
| 9. |
Losses in photonic crystal fibers are reduced to a level of ___________ |
| A. | 0.1dB/km |
| B. | 0.2dB/km |
| C. | 0.3dB/km |
| D. | 0.4dB/km |
| Answer» D. 0.4dB/km | |
| 10. |
Conventional optical fibers has more transmission losses than photonic crystal fibers. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Photonic crystal fibers also called as ___________ |
| A. | Conventional fibers |
| B. | Dotted fibers |
| C. | Stripped fibers |
| D. | Holey fibers |
| Answer» E. | |
| 12. |
IF_THE_INPUT_POWER_100‚ÂÀ√≠¬¨‚À´W_IS_LAUNCHED_INTO_6_KM_OF_FIBER,_THE_MEAN_OPTICAL_POWER_AT_THE_FIBER_OUTPUT_IS_2‚ÂÀ√≠¬¨‚À´W._WHAT_IS_THE_OVERALL_SIGNAL_ATTENUATION_THROUGH_THE_FIBER_ASSUMING_THERE_ARE_NO_CONNECTORS_OR_SPLICES??$# |
| A. | 15.23dB |
| B. | 16.98dB |
| C. | 17.12dB |
| D. | 16.62dB |
| Answer» C. 17.12dB | |
| 13. |
A decibel may be defined as the ratio of input and output optical power for a particular optical wavelength. State whether the following statement is true or false.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
A device which reduces the intensity of light in optical fiber communications is$ |
| A. | compressor |
| B. | Optical attenuator |
| C. | Barometer |
| D. | Reducer |
| Answer» C. Barometer | |
| 15. |
When the input and output power in an optical fiber is 120μW & 3μW respectively and the length of the fiber is 8 km. What is the signal attenuation per km for the fiber?$ |
| A. | 3dB/km |
| B. | 2dB/km |
| C. | 1dB/km |
| D. | 4dB/km |
| Answer» C. 1dB/km | |
| 16. |
The optical fiber incurs a loss in signal power as light travels down the fiber which is called a? |
| A. | Scattering |
| B. | Attenuation |
| C. | Absorption |
| D. | Refraction |
| Answer» C. Absorption | |
| 17. |
The unit of measurement of attenuation in optical fibers is |
| A. | km |
| B. | dB |
| C. | dB/km |
| D. | Coulomb’s |
| Answer» D. Coulomb‚Äö√Ñ√∂‚àö√ë‚àö¬•s | |
| 18. |
In index-guided photonic crystal fiber structure, the dark areas are air holes. What does white areas suggests? |
| A. | Air |
| B. | Silica |
| C. | Water |
| D. | Plasma |
| Answer» E. | |
| 19. |
The periodic arrangement of cladding air holes in photonic band gap fibers provides for the formation of a photonic band gap in the |
| A. | H-plane of fiber |
| B. | E-plane of fiber |
| C. | E-H-plane of fiber |
| D. | Transverse plane of fiber |
| Answer» E. | |
| 20. |
The high index contrast enables the PCF core to be reduced from around 8 μmin conventional fiber to$ |
| A. | Less than 1μm |
| B. | More than 5μm |
| C. | More than 3μm |
| D. | More than 2μm |
| Answer» B. More than 5‚âà√≠¬¨‚à´m | |
| 21. |
Losses in photonic crystal fibers are reduced to a level of |
| A. | 0.1dB/km |
| B. | 0.2dB/km |
| C. | 0.3dB/km |
| D. | 0.4dB/km |
| Answer» D. 0.4dB/km | |
| 22. |
Conventional optical fibers has more transmission losses than photonic crystal fibers. State whether the statement is true or false. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 23. |
Photonic crystal fibers also called as |
| A. | Conventional fibers |
| B. | Dotted fibers |
| C. | Stripped fibers |
| D. | Holey fibers |
| Answer» E. | |