MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Antennas knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In which of the following modes of propagation the ionosphere acts as the reflecting surface for the waves? |
| A. | Ground wave |
| B. | Sky wave |
| C. | Space wave |
| D. | LOS |
| Answer» C. Space wave | |
| 2. |
In which of the following mode of propagation the waves are guided along the surface of the earth? |
| A. | Ground wave |
| B. | Sky wave |
| C. | LOS |
| D. | Space wave |
| Answer» B. Sky wave | |
| 3. |
Communication through LOS can be increased by decreasing the height of antenna. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Space wave propagates at which frequency band? |
| A. | VHF |
| B. | HF |
| C. | MF |
| D. | EHF |
| Answer» B. HF | |
| 5. |
Space wave propagation reflects the waves with frequencies _________ |
| A. | Below 2 GHz |
| B. | 2 to 30MHz |
| C. | Above 30GHz |
| D. | Above 30MHz |
| Answer» E. | |
| 6. |
At what distance the sky wave propagation is present from the earth surface? |
| A. | 50 to 400km |
| B. | Below 50 km |
| C. | 600 to 750km |
| D. | 50 to 400 m |
| Answer» B. Below 50 km | |
| 7. |
Sky wave propagation reflects the frequencies ___________ |
| A. | 2MHz |
| B. | 2 MHz to 30MHz |
| C. | 2 GHz to 30 GHz |
| D. | 30 GHz to 50GHz |
| Answer» C. 2 GHz to 30 GHz | |
| 8. |
During ground wave propagation earth behaves like a __________ |
| A. | Leaky capacitor |
| B. | Leaky Inductor |
| C. | Series combination of capacitor and inductor |
| D. | Parallel combination of capacitor and inductor |
| Answer» B. Leaky Inductor | |
| 9. |
In a ground wave propagation, which component of electric field is short circuited when it s in contact by earth? |
| A. | Horizontal |
| B. | Vertical |
| C. | Both horizontal and vertical |
| D. | Neither horizontal nor vertical |
| Answer» B. Vertical | |
| 10. |
Up to which frequency the ground wave propagation is used? |
| A. | 2MHz |
| B. | 2GHz |
| C. | 30MHz |
| D. | 30GHz |
| Answer» B. 2GHz | |