MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Avionics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following modulating signal voltage would cause over-modulation on a carrier voltage of 10v? |
| A. | 9.5 |
| B. | 9.99 |
| C. | 10 |
| D. | 12 |
| Answer» E. | |
| 2. |
What is the modulation index value if Vmax=5.9v and Vmin=1.2v? |
| A. | 0.5 |
| B. | 0.662 |
| C. | 0.425 |
| D. | 0.14 |
| Answer» C. 0.425 | |
| 3. |
What is the condition for greatest output power at the transmitter without distortion? |
| A. | Modulating signal voltage > Carrier voltage |
| B. | Modulating signal voltage < Carrier voltage |
| C. | Modulating signal voltage = Carrier voltage |
| D. | Modulating signal voltage = 0 |
| Answer» D. Modulating signal voltage = 0 | |
| 4. |
When does over-modulation occur? |
| A. | Modulating signal voltage < Carrier voltage |
| B. | Modulating signal voltage > Carrier voltage |
| C. | Modulating signal voltage = Carrier voltage |
| D. | Modulating signal voltage =0 |
| Answer» C. Modulating signal voltage = Carrier voltage | |
| 5. |
WHEN_DOES_OVER-MODULATION_OCCUR??$ |
| A. | Modulating signal voltage < Carrier voltage |
| B. | Modulating signal voltage > Carrier voltage |
| C. | Modulating signal voltage = Carrier voltage |
| D. | Modulating signal voltage =0 |
| Answer» C. Modulating signal voltage = Carrier voltage | |
| 6. |
What is the modulation index value if Vmax=5.9v and Vmin=1.2v?$ |
| A. | 0.5 |
| B. | 0.662 |
| C. | 0.425 |
| D. | 0.14 |
| Answer» C. 0.425 | |
| 7. |
What_is_the_condition_for_greatest_output_power_at_the_transmitter_without_distortion?$ |
| A. | Modulating signal voltage > Carrier voltage |
| B. | Modulating signal voltage < Carrier voltage |
| C. | Modulating signal voltage = Carrier voltage |
| D. | Modulating signal voltage = 0 |
| Answer» D. Modulating signal voltage = 0 | |
| 8. |
What is the modulating signal voltage if the maximum and the minimum voltages on the wave was observed to be 5.9v and 1.2v respectively? |
| A. | 2.35v |
| B. | 2.12v |
| C. | 1.85v |
| D. | 3.21v |
| Answer» B. 2.12v | |
| 9. |
Which_of_the_following_modulating_signal_voltage_would_cause_over-modulation_on_a_carrier_voltage_of_10v? |
| A. | 9.5 |
| B. | 9.99 |
| C. | 10 |
| D. | 12 |
| Answer» E. | |
| 10. |
What is the percentage of modulation if the modulating signal is of 7.5V and carrier is of 9V? |
| A. | 100 |
| B. | 91 |
| C. | 83.33 |
| D. | 0 |
| Answer» D. 0 | |
| 11. |
The ratio between the modulating signal voltage and the carrier voltage is called? |
| A. | Amplitude modulation |
| B. | Modulation frequency |
| C. | Modulation index |
| D. | Ratio of modulation |
| Answer» D. Ratio of modulation | |
| 12. |
What is the circuit used for producing AM called? |
| A. | Modulator |
| B. | Transmitter |
| C. | Receiver |
| D. | Duplexer |
| Answer» B. Transmitter | |
| 13. |
What is the effect of distortion? |
| A. | Total information loss |
| B. | Error information |
| C. | Attenuated information |
| D. | Amplified information |
| Answer» C. Attenuated information | |
| 14. |
What happens when the amplitude of the modulating signal is greater than the amplitude of the carrier? |
| A. | Decay |
| B. | Distortion |
| C. | Amplification |
| D. | Attenuation |
| Answer» C. Amplification | |
| 15. |
What is the reference line for the modulating signal? |
| A. | Zero line |
| B. | Carrier peak line |
| C. | Modulated peak line |
| D. | Un-modulated peak line |
| Answer» C. Modulated peak line | |
| 16. |
What is the line connecting the positive and negative peaks of the carrier waveform called? |
| A. | Peak line |
| B. | Maximum amplitude ceiling |
| C. | Modulation index |
| D. | Envelope |
| Answer» E. | |
| 17. |
In Amplitude Modulation, the instantaneous values of the carrier amplitude changes in accordance with the amplitude and frequency variations of the modulating signal. |
| A. | True |
| B. | False |
| Answer» B. False | |