MCQOPTIONS
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MCQOPTIONS
This section includes 44 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 cannot travel in vacuum? |
| A. | Radio waves |
| B. | Gamma Waves |
| C. | Infrared Waves |
| D. | Infrasonic waves |
| Answer» E. | |
| 2. |
Pick out the correct increasing order of energy of electromagnetic waves from the following. |
| A. | Einfrared < Emicro < Evisible < Eultraviolet < Egamma |
| B. | Emicro < Einfrared < Evisible < Eultraviolet < Egamma |
| C. | Emicro < Einfrared < Evisible < Egamma < Eultraviolet |
| D. | Emicro < Einfrared < Eultraviolet < Evisible < Egamma |
| Answer» C. Emicro < Einfrared < Evisible < Egamma < Eultraviolet | |
| 3. |
Electromagnetic radiation has an energy of 15 keV. Then this radiation belongs to which region of electromagnetic waves? |
| A. | X rays |
| B. | Infrared rays |
| C. | Gamma rays |
| D. | UV rays |
| Answer» B. Infrared rays | |
| 4. |
The speeds of microwaves, infrared waves, and ultraviolet waves are Vm, Vi, and Vu respectively. Identify the correct combination showing the different waves in vacuum. |
| A. | Vm > Vi > Vu |
| B. | Vm = Vi = Vu |
| C. | Vm < Vi < Vu |
| D. | Vm > Vi < Vu |
| Answer» C. Vm < Vi < Vu | |
| 5. |
A radio can tune to any station in the frequency range from 2.5 MHz to 15 MHz bands. What is the corresponding wavelength band? |
| A. | 30 m to 130 m |
| B. | 40 m to 140 m |
| C. | 20 m to 120 m |
| D. | 10 m to 110 m |
| Answer» D. 10 m to 110 m | |
| 6. |
Which is the frequency range of gamma rays from the following? |
| A. | 1 × 1018 to 3 × 1022 Hz |
| B. | 3 × 10-18 to 5 × 1022 Hz |
| C. | 3 × 1018 to 5 × 1022 Hz |
| D. | 3 × 10-18 to 5 × 10-22 Hz |
| Answer» D. 3 × 10-18 to 5 × 10-22 Hz | |
| 7. |
Monica wanted to take photographs of a monument. But since the surrounding is filled with smoke, she is not able to take good photos. Which one of the following electromagnetic waves can be used in this situation to help Monica? |
| A. | X-rays |
| B. | Gamma rays |
| C. | Ultraviolet rays |
| D. | Infrared waves |
| Answer» E. | |
| 8. |
Stephen is thinking of going to the hospital for checking whether he has tuberculosis since he believes that he may have some early symptoms of the disease. His friend suggests him to do an x-ray checkup to clear up the confusion. Is the suggestion made by Stephen’s friend going to help him? |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Pick out the electromagnetic wave which is highly harmful to humans. |
| A. | Radio waves |
| B. | Ultraviolet Rays |
| C. | Microwaves |
| D. | Infrared Waves |
| Answer» C. Microwaves | |
| 10. |
Identify the electromagnetic wave which is also known as heatwaves. |
| A. | Radio Waves |
| B. | Gamma Waves |
| C. | X-Rays |
| D. | Infrared Waves |
| Answer» E. | |
| 11. |
Which among the following is an application of microwaves? |
| A. | Solar cells |
| B. | Ovens |
| C. | Radiotherapy |
| D. | Burglar alarms |
| Answer» C. Radiotherapy | |
| 12. |
Microwaves are produced by klystrons. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
What is the full form of UHF? |
| A. | Under heavy frequency |
| B. | Ultra-high frequency |
| C. | Ultra heavy frequency |
| D. | Under high frequency |
| Answer» C. Ultra heavy frequency | |
| 14. |
Which among the following has a frequency range of 500 kHz to 1000 MHz? |
| A. | Microwaves |
| B. | Infrared Waves |
| C. | Radio Waves |
| D. | Gamma Rays |
| Answer» D. Gamma Rays | |
| 15. |
On what basis is the classification of electromagnetic waves done? |
| A. | Electromagnetic spectrum |
| B. | Electric field |
| C. | Magnetic field |
| D. | Propagation constant |
| Answer» B. Electric field | |
| 16. |
The formula of energy produced from the body can be given as _________ |
| A. | Q = h- c / λ |
| B. | Q = h*c * λ |
| C. | Q = h+ c / λ |
| D. | Q = h*c / λ |
| Answer» E. | |
| 17. |
EM waves varies from ______ to ________ |
| A. | Meters to nano-meters |
| B. | Meters to micro-meters |
| C. | Nano to micro-meters |
| D. | Centimeters to nano-meters |
| Answer» B. Meters to micro-meters | |
| 18. |
How much wave length is reflected back by the earth surface from the absorbed sun radiation? |
| A. | 0.5meter |
| B. | 0.5 micrometer |
| C. | 0.5 centimeter |
| D. | 0.5 decimeter |
| Answer» C. 0.5 centimeter | |
| 19. |
Which of the following indicates the correct set of combination in radio waves? |
| A. | Shorter wavelength – high frequency |
| B. | Longer wavelength – less frequency |
| C. | Shorter wavelength – less frequency |
| D. | Longer wavelength – high frequency |
| Answer» B. Longer wavelength – less frequency | |
| 20. |
Which of the following waves can be used in case of remote sensing? |
| A. | UV rays |
| B. | X-rays |
| C. | Gamma rays |
| D. | Visible rays |
| Answer» E. | |
| 21. |
Gamma rays are having a wavelength of _________ |
| A. | Zero |
| B. | Greater than 0.03nm |
| C. | Less than 0.03nm |
| D. | Equal to 0.03nm |
| Answer» D. Equal to 0.03nm | |
| 22. |
Radio waves are having the longest wavelength among all the electromagnetic waves. |
| A. | False |
| B. | True |
| Answer» C. | |
| 23. |
Optical mechanical scanner is used in which type of electromagnetic waves? |
| A. | X-rays |
| B. | Cosmic waves |
| C. | Radio waves |
| D. | Thermal IR |
| Answer» E. | |
| 24. |
Which among the following wave is not employed in case of remote sensing? |
| A. | X-ray |
| B. | Visible ray |
| C. | Thermal IR |
| D. | Radio waves |
| Answer» B. Visible ray | |
| 25. |
Which among the following is having more wavelengths? |
| A. | X-rays |
| B. | Cosmic waves |
| C. | Radio waves |
| D. | Gamma rays |
| Answer» D. Gamma rays | |
| 26. |
Energy of the discrete particles can be given by_______ |
| A. | Photons |
| B. | Protoplasm |
| C. | Electrons |
| D. | Neutrons |
| Answer» B. Protoplasm | |
| 27. |
Which one of the following is not a reason for not using X-rays in communication? |
| A. | Highly attenuated |
| B. | High power is required |
| C. | Stopped by ionizing effects |
| D. | Ionizing radiation |
| Answer» D. Ionizing radiation | |
| 28. |
Which one of the following is not a source of infrared radiation? |
| A. | Human bodies |
| B. | Light bulbs |
| C. | Sun |
| D. | Books |
| Answer» E. | |
| 29. |
A signal travels a distance of 75 ft in the time it takes to complete 1 cycle. What is its frequency?1 m 5 3.28 ft |
| A. | 13Mhz |
| B. | 13.12Mhz |
| C. | 14Mhz |
| D. | Cannot be determined |
| Answer» C. 14Mhz | |
| 30. |
WHICH_ONE_OF_THE_FOLLOWING_IS_NOT_A_SOURCE_OF_INFRARED_RADIATION??$ |
| A. | Human bodies |
| B. | Light bulbs |
| C. | Sun |
| D. | Books |
| Answer» E. | |
| 31. |
The portion of the electromagnetic spectrum occupied by a signal is called ________$ |
| A. | Signal spectrum |
| B. | Bandwidth |
| C. | Frequency width |
| D. | Signal strength |
| Answer» C. Frequency width | |
| 32. |
Which one of the following is not a reason for not using X-rays in communication?$ |
| A. | Highly attenuated |
| B. | High power is required |
| C. | Stopped by ionizing effects |
| D. | Ionizing radiation |
| Answer» D. Ionizing radiation | |
| 33. |
Which organization regulates international EM spectrum division? |
| A. | ITU |
| B. | FCC |
| C. | NTIA |
| D. | WCC |
| Answer» B. FCC | |
| 34. |
Higher frequencies can have more channels for a particular bandwidth. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 35. |
What is the upper frequency of a signal with a bandwidth of 6Mhz, if the lower frequency limit is 54Mhz? |
| A. | 60Mhz |
| B. | 48Mhz |
| C. | 60Hz |
| D. | 48Hz |
| Answer» B. 48Mhz | |
| 36. |
What is the bandwidth of a signal having 928Mhz and 902Mhz as its upper and lower frequencies? |
| A. | 26Mhz |
| B. | 26Hz |
| C. | 1830Hz |
| D. | 1830Mhz |
| Answer» B. 26Hz | |
| 37. |
SHF Em waves are used in? |
| A. | Ground to ground communication |
| B. | Satellite communication |
| C. | Aircraft to ATC communication |
| D. | Underwater communication |
| Answer» C. Aircraft to ATC communication | |
| 38. |
The maximum peaks of an electromagnetic wave are separated by a distance of 8 in. What is the frequency? |
| A. | 256.4Khz |
| B. | 1477.8Khz |
| C. | 1477.8Mhz |
| D. | 256.7Mhz |
| Answer» D. 256.7Mhz | |
| 39. |
A signal travels a distance of 75 ft in the time it takes to complete 1 cycle. What is its frequency? |
| A. | |
| B. | 13Mhz |
| C. | 13.12Mhz |
| Answer» C. 13.12Mhz | |
| 40. |
What is the frequency of the EM wave with a wavelength of 12cm? |
| A. | 2.4Ghz |
| B. | 2.5Ghz |
| C. | 250 Mhz |
| D. | 0.25Mhz |
| Answer» C. 250 Mhz | |
| 41. |
What is the wavelength of a signal with a frequency of 150Mhz? |
| A. | 10m |
| B. | 2m |
| C. | 5m |
| D. | 20m |
| Answer» C. 5m | |
| 42. |
The distance that the wave travels in one cycle is called as? |
| A. | Displacement |
| B. | Wavelength |
| C. | Cycle length |
| D. | Cycle amplitude |
| Answer» C. Cycle length | |
| 43. |
The range of electromagnetic signals encompassing all frequencies is referred to as? |
| A. | EM waves |
| B. | EM frequency |
| C. | EM spectrum |
| D. | EM radiation |
| Answer» D. EM radiation | |
| 44. |
Cps is the unit of what? |
| A. | Frequency |
| B. | Amplitude |
| C. | Phase |
| D. | Gain |
| Answer» B. Amplitude | |