MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Aircraft Maintenance knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
HF radio waves can travel beyond the horizon. |
| A. | False |
| B. | True |
| Answer» C. | |
| 2. |
The MUF is lowest when the waves are directed ___________ |
| A. | Straight downwards |
| B. | Straight upwards |
| C. | Diagonally |
| D. | Incidentally |
| Answer» C. Diagonally | |
| 3. |
Which of the following is referred to as the upper section of HF? |
| A. | 26.5 MHz to 30 MHz |
| B. | 26.5 Hz to 30 Hz |
| C. | 265 MHz to 300 MHz |
| D. | 265 Hz to 300 Hz |
| Answer» B. 26.5 Hz to 30 Hz | |
| 4. |
What is the full form of RFID? |
| A. | Real frequency identification |
| B. | Radar frequency identification |
| C. | Radio frequency identification |
| D. | Rate frequency identification |
| Answer» D. Rate frequency identification | |
| 5. |
On a day in full summer the __________ tend to be more usable. |
| A. | Ultra low frequencies |
| B. | Medium frequencies |
| C. | Lower frequencies |
| D. | Higher frequencies |
| Answer» E. | |
| 6. |
In aviation, HF communication systems are required for all trans-oceanic flights. |
| A. | False |
| B. | True |
| Answer» C. | |
| 7. |
The lowest usable frequency depends on the absorption of which of the following layers? |
| A. | D-layer |
| B. | E-layer |
| C. | F-layer |
| D. | G-layer |
| Answer» B. E-layer | |
| 8. |
What is the full form of FOT? |
| A. | Frequency of open transmission |
| B. | Frequency of optimum transmission |
| C. | Frequency of optical transmission |
| D. | Frequency of optional transmission |
| Answer» C. Frequency of optical transmission | |
| 9. |
What is the frequency range of HF (High frequency)? |
| A. | 3 MHz to 30 MHz |
| B. | 3 Hz to 30 Hz |
| C. | 3 KHz to 30 KHz |
| D. | 3 mHz to 30 mHz |
| Answer» B. 3 Hz to 30 Hz | |
| 10. |
Frequencies immediately below HF are referred to as _______ |
| A. | Medium frequency |
| B. | Ultra high frequency |
| C. | Low frequency |
| D. | Ultra low frequency |
| Answer» B. Ultra high frequency | |
| 11. |
What is the wavelength range of HF? |
| A. | 100km to 10km |
| B. | 1000m to 100m |
| C. | 1000km to 100km |
| D. | 100m to 10m |
| Answer» E. | |
| 12. |
Communication at high frequencies is often called as ____________ |
| A. | Longwave radio |
| B. | Ultra shortwave radio |
| C. | Shortwave radio |
| D. | Mediumwave radio |
| Answer» D. Mediumwave radio | |
| 13. |
The High frequency band is also known as ___________ |
| A. | Pentameter band |
| B. | Decameter band |
| C. | Quadmeter band |
| D. | Hexameter band |
| Answer» C. Quadmeter band | |
| 14. |
Which of the following is not a factor influencing HF propagation? |
| A. | Wind speed |
| B. | Season |
| C. | Solar activity |
| D. | Sunspot cycle |
| Answer» B. Season | |
| 15. |
What is the full form of MUF? |
| A. | Most usable frequency |
| B. | Minimum usable frequency |
| C. | Maximum usable frequency |
| D. | Minimal usable frequency |
| Answer» D. Minimal usable frequency | |