MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Avionics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
According to Carson s rule, what is the bandwidth of the signal with a deviation of 30kHz and a maximum modulating signal of frequency 5kHz? |
| A. | 70kHz |
| B. | 90kHz |
| C. | 100kHz |
| D. | 80kHz |
| Answer» B. 90kHz | |
| 2. |
What is the number of significant sidebands produced when the bandwidth of the signal is 24kHz and the modulating frequency is 3kHz? |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» B. 5 | |
| 3. |
What is the modulation index for the FM to behave as a narrowband? |
| A. | 1 |
| B. | 0.5 |
| C. | 0.25 |
| D. | 0.1 |
| Answer» D. 0.1 | |
| 4. |
What is it called when an FM signal occupies no more spectrum space than AM signal? |
| A. | Amplitude modulated frequency wave |
| B. | Narrowband FM |
| C. | Shortband FM |
| D. | Equalband FM |
| Answer» C. Shortband FM | |
| 5. |
What is the deviation ratio if the maximum deviation is 25kHz and the maximum modulating frequency is 15kHz? |
| A. | 1.55 |
| B. | 1.667 |
| C. | 4.7 |
| D. | 2.13 |
| Answer» C. 4.7 | |
| 6. |
What is the modulation index of a system with modulating frequency 75kHz and maximum frequency deviation 15kHz? |
| A. | 5 |
| B. | 7 |
| C. | 3 |
| D. | 1 |
| Answer» B. 7 | |
| 7. |
What is the ratio of frequency deviation to the modulating frequency is known as? |
| A. | Frequency index |
| B. | Modulating index |
| C. | Modulation index |
| D. | Modulation ratio |
| Answer» D. Modulation ratio | |
| 8. |
FM and PM are more susceptible to noise than AM signals. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
What type of modulation uses discrete values of carrier frequencies to transmit binary data? |
| A. | Frequency modulation |
| B. | Amplitude shift keying |
| C. | Frequency shift keying |
| D. | Phase modulation |
| Answer» D. Phase modulation | |
| 10. |
The frequency of modulating signal has no effect on the amount of frequency deviation of a carrier signal in FM. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
The maximum shift in frequency is 3kHz and the minimum and maximum deviation in frequency of the actual signal are 149.97MHz and 150.03MHz. What is the carrier frequency? |
| A. | 150MHz |
| B. | 153MHz |
| C. | 140MHz |
| D. | 100Mhz |
| Answer» B. 153MHz | |
| 12. |
The value of a change in frequency of the carrier wave by the modulating signal is called as? |
| A. | Maximum modulation frequency |
| B. | Maximum carrier frequency |
| C. | Frequency deviation |
| D. | Modulating frequency deviation |
| Answer» D. Modulating frequency deviation | |
| 13. |
What are FM and AM collectively referred together as? |
| A. | Modulation |
| B. | Angle modulation |
| C. | Fast band modulation |
| D. | Hi-fi Modulation |
| Answer» C. Fast band modulation | |