MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which modulation is used by a microwave system? |
| A. | FM |
| B. | SSB |
| C. | QAM |
| D. | Either FM or SSB or QAM |
| Answer» E. | |
| 2. |
What is the approximate reliability of a microwave system? |
| A. | 90% |
| B. | 99% |
| C. | 99.99% |
| D. | 90.99% |
| Answer» D. 90.99% | |
| 3. |
An antenna has “gain” as compared to ________ |
| A. | Helical antenna |
| B. | Marconi antenna |
| C. | Vertically polarized radiator |
| D. | Isotropic radiator |
| Answer» E. | |
| 4. |
What effect will be seen on the resistance of a wire if we increase the frequency? |
| A. | it will also increase |
| B. | it starts to decrease |
| C. | it will remain same |
| D. | it starts changing periodically |
| Answer» B. it starts to decrease | |
| 5. |
WHAT_IS_THE_APPROXIMATE_RELIABILITY_OF_A_MICROWAVE_SYSTEM??$ |
| A. | 90% |
| B. | 99% |
| C. | 99.99% |
| D. | 90.99% |
| Answer» D. 90.99% | |
| 6. |
Which modulation is used by a microwave system?$ |
| A. | FM |
| B. | SSB |
| C. | QAM |
| D. | Either FM or SSB or QAM |
| Answer» E. | |
| 7. |
In digital microwave systems, additional repeaters increase the _______? |
| A. | selectivity |
| B. | noise level |
| C. | jitter |
| D. | sensitivity |
| Answer» D. sensitivity | |
| 8. |
The microwave frequency range is considered to start at ________ |
| A. | 1 GHz |
| B. | 10 GHz |
| C. | 100 GHz |
| D. | 5 GHz |
| Answer» B. 10 GHz | |
| 9. |
Ground waves are most effective when _________ |
| A. | it is above about 20MHZ |
| B. | it is below about 3MHz |
| C. | it is at microwave frequencies |
| D. | usually in the UHF range |
| Answer» C. it is at microwave frequencies | |
| 10. |
An antenna has “gain” as compared to ________$ |
| A. | Helical antenna |
| B. | Marconi antenna |
| C. | Vertically polarized radiator |
| D. | Isotropic radiator |
| Answer» E. | |
| 11. |
What is speed of radio waves in free space? |
| A. | 3 x 10<sup>6</sup> m/s |
| B. | 3 x 10<sup>9</sup> m/s |
| C. | 300 x 10<sup>6</sup> m/s |
| D. | 300 x 10<sup>9</sup> m/s |
| Answer» D. 300 x 10<sup>9</sup> m/s | |
| 12. |
What effect will be seen on the resistance of a wire if we increases the frequency? |
| A. | it will also increase |
| B. | it starts to decrease |
| C. | it will remain same |
| D. | it starts changing periodically |
| Answer» B. it starts to decrease | |
| 13. |
When analyzing a transmission line, its inductance and capacitance are considered as _________ |
| A. | distributed |
| B. | lumped |
| C. | equal reactances |
| D. | equal impedances |
| Answer» B. lumped | |
| 14. |
FSK stands for ________ |
| A. | Frequency Segregation Keying |
| B. | Frequency Section Keying |
| C. | Frequency Signal Keying |
| D. | Frequency Shift Keying |
| Answer» E. | |