MCQOPTIONS
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MCQOPTIONS
This section includes 21 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. |
________________ measurements checks the impurity level in the manufacturing process. |
| A. | Material reflectometry |
| B. | Material absorption loss |
| C. | Material attenuation loss |
| D. | Calorimetric loss |
| Answer» C. Material attenuation loss | |
| 2. |
Which technology is used by the backscatter measurement method? |
| A. | Refraction |
| B. | Francis flat recovery |
| C. | Optical time domain reflectometry |
| D. | Optical frequency |
| Answer» D. Optical frequency | |
| 3. |
Cut-back technique is destructive. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
___________ are used to allow measurements at a selection of different wavelengths. |
| A. | Diaphragms |
| B. | Spot attenuators |
| C. | Belts |
| D. | Interference filters |
| Answer» E. | |
| 5. |
Determine the attenuation per kilometer for a fiber whose length is 2 km, output voltage is 2.1 V at a wavelength of 0.85μm. The output voltage increases to 10.7 V when the fiber is cut-back to leave 2 metres. Determine the attenuation per km for the fiber at wavelength 0.85μm. |
| A. | 2.8dB/km |
| B. | 3.1dB/km |
| C. | 3.5dB/km |
| D. | 8dB/km |
| Answer» D. 8dB/km | |
| 6. |
What type of light source is usually present in the cut-back method? |
| A. | Tungsten or xenon |
| B. | LED |
| C. | Laser |
| D. | Photo-sensor |
| Answer» B. LED | |
| 7. |
CUT-BACK_TECHNIQUE_IS_DESTRUCTIVE._STATE_WHETHER_THE_GIVEN_STATEMENT_IS_TRUE_OR_FALSE.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
________________ measurements checks the impurity level in the manufacturing process.$ |
| A. | Material reflectometry |
| B. | Material absorption loss |
| C. | Material attenuation loss |
| D. | Calorimetric loss |
| Answer» C. Material attenuation loss | |
| 9. |
Which technology is used by the backscatter measurement method?$ |
| A. | Refraction |
| B. | Francis flat recovery |
| C. | Optical time domain reflectometry |
| D. | Optical frequency |
| Answer» D. Optical frequency | |
| 10. |
___________ removes the light propagating in the cladding. |
| A. | Cladding mode strippers |
| B. | Core strippers |
| C. | Mode enhancers |
| D. | Attenuators |
| Answer» B. Core strippers | |
| 11. |
A scattering cell consists of ______ square solar cells called as Tynes cell. |
| A. | Five |
| B. | Four |
| C. | Six |
| D. | Three |
| Answer» D. Three | |
| 12. |
_____________ may be achieved by replacing the optical fibers with thin resistance wires. |
| A. | Diffraction |
| B. | Segmentation |
| C. | Calorimetric calibration |
| D. | Electrical calibration |
| Answer» E. | |
| 13. |
___________ are used to allow measurements at a selection of different wavelengths? |
| A. | Diaphragms |
| B. | Spot attenuators |
| C. | Belts |
| D. | Interference filters |
| Answer» E. | |
| 14. |
Determine the attenuation per kilometer for a fiber whose length is 2 km, output voltage is 2.1 V at a wavelength of 0.85μm. The output voltage increases to 10.7 V when the fiber is cut-back to leave 2 metres. Determine the attenuation per km for the fiber at wavelength 0.85μm?# |
| A. | 2.8dB/km |
| B. | 3.1dB/km |
| C. | 3.5dB/km |
| D. | 8dB/km |
| Answer» D. 8dB/km | |
| 15. |
What is the unit of measurement of the optical attenuation per unit length? |
| A. | dB-km |
| B. | dB/km |
| C. | km/dB |
| D. | V |
| Answer» C. km/dB | |
| 16. |
What is the hierarchy of the process at the receiving end of the cut-back technique? |
| A. | Photodiode – photo-detector – lock-in amplifier |
| B. | Photodiode – lock-in amplifier |
| C. | Photodiode – photo-detector – Attenuator |
| D. | Photo-detector – lock-in amplifier – receiver |
| Answer» B. Photodiode ‚Äö√Ñ√∂‚àö√ë‚àö¬® lock-in amplifier | |
| 17. |
The device used to remove any scattered optical power from the core is __________ |
| A. | Mode setup terminator |
| B. | Nodal spectrum |
| C. | Mode stripper |
| D. | Attenuator |
| Answer» D. Attenuator | |
| 18. |
What type of a light source is usually present in the cut-back method? |
| A. | Tungsten or xenon |
| B. | LED |
| C. | Laser |
| D. | Photo-sensor |
| Answer» B. LED | |
| 19. |
How many parameters are usually worked upon by the measurement techniques in attenuation? |
| A. | Three |
| B. | Two |
| C. | One |
| D. | Five |
| Answer» C. One | |
| 20. |
The system designer finds greatest interest in the ______________ |
| A. | Overall fiber attenuation |
| B. | Fiber dispersion |
| C. | Latitude of the fiber |
| D. | Durability |
| Answer» B. Fiber dispersion | |
| 21. |
A technique used for determining the total fiber attenuation per unit length is ________ method. |
| A. | Frank |
| B. | Cut-off |
| C. | cut-back |
| D. | Erlangen |
| Answer» D. Erlangen | |