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. |
What type of oscillators are used to input a wide range of frequencies to the IF amplifier? |
| A. | LC oscillators |
| B. | Crystal oscillators |
| C. | Variable frequency oscillators |
| D. | Diode oscillators |
| Answer» D. Diode oscillators | |
| 2. |
The LNA of a transducer has failed during the transmission of a signal. Which component’s failure has caused this? |
| A. | Duplexer |
| B. | RF amplifier |
| C. | Antenna |
| D. | Mixer |
| Answer» B. RF amplifier | |
| 3. |
Which of the following is not an advantage of using RF amplifiers in the initial stage of signal selection? |
| A. | Low noise |
| B. | Reduced oscillator radiation |
| C. | Better selectivity |
| D. | Less power consumption |
| Answer» E. | |
| 4. |
What is connected between the antenna and the mixer to avoid oscillator radiation? |
| A. | LNA |
| B. | Attenuator |
| C. | Duplexer |
| D. | Power amplifier |
| Answer» B. Attenuator | |
| 5. |
Analog signals : Signal to noise ratio:: Digital signals _________ |
| A. | Signal Attenuation |
| B. | Bit error rate |
| C. | Error rate |
| D. | Digital noise ratio |
| Answer» C. Error rate | |
| 6. |
WHAT_IS_CONNECTED_BETWEEN_THE_ANTENNA_AND_THE_MIXER_TO_AVOID_OSCILLATOR_RADIATION??$ |
| A. | LNA |
| B. | Attenuator |
| C. | Duplexer |
| D. | Power amplifier |
| Answer» B. Attenuator | |
| 7. |
The LNA of a transducer has failed during the transmission of a signal. Which component’s failure has caused this?$# |
| A. | Duplexer |
| B. | RF amplifier |
| C. | Antenna |
| D. | Mixer |
| Answer» B. RF amplifier | |
| 8. |
Which_of_the_following_is_not_an_advantage_of_using_RF_amplifiers_in_the_initial_stage_of_signal_selection?$ |
| A. | Low noise |
| B. | Reduced oscillator radiation |
| C. | Better selectivity |
| D. | Less power consumption |
| Answer» E. | |
| 9. |
What_type_of_oscillators_are_used_to_input_a_wide_range_of_frequencies_to_the_IF_amplifier? |
| A. | LC oscillators |
| B. | Crystal oscillators |
| C. | Variable frequency oscillators |
| D. | Diode oscillators |
| Answer» D. Diode oscillators | |
| 10. |
What is the output of a mixer circuit? |
| A. | Sum of frequencies |
| B. | Difference of frequencies |
| C. | Sum and difference of frequencies |
| D. | Multiplication of frequencies |
| Answer» D. Multiplication of frequencies | |
| 11. |
What type of receivers converts all incoming frequency into a lower frequency for better selectivity and sensitivity? |
| A. | Analogous receivers |
| B. | Superheterodyne receivers |
| C. | Digital receiver |
| D. | Crystal receiver |
| Answer» C. Digital receiver | |
| 12. |
A sensitive and selective receiver can be made using only amplifiers, selective filters, and a demodulator. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Analog signals : Signal to noise ratio:: Digital signals _________ |
| A. | Signal Attenuation |
| B. | Bit error rate |
| C. | Error rate |
| D. | Digital noise ratio |
| Answer» C. Error rate | |
| 14. |
What is the input signal level that is approximately equal to the average internally generated noise value called? |
| A. | MDS |
| B. | MBS |
| C. | MMD |
| D. | MSD |
| Answer» B. MBS | |
| 15. |
The ability to pick up week signals by a receiver is called _________ |
| A. | Gain |
| B. | Amplification |
| C. | Sensitivity |
| D. | Selectivity |
| Answer» D. Selectivity | |
| 16. |
What circuit provides the initial selectivity in a receiver? |
| A. | Amplifier |
| B. | Attenuator |
| C. | Multiplexer |
| D. | LC tuned circuits |
| Answer» E. | |
| 17. |
Which of the following are the two main characteristics of receivers? |
| A. | Selectivity and sensitivity |
| B. | Gain and attenuation |
| C. | Modulation and demodulation |
| D. | Multiplexing and demultiplexing |
| Answer» B. Gain and attenuation | |