MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Antennas knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Skip zone is distance between the point where the ground wave reception becomes zero and the sky wave returns for the first time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The height at a point above the earth s surface at which the wave bends down to the earth is called ______ |
| A. | Actual height |
| B. | Virtual height |
| C. | Skip distance |
| D. | Distance of separation between transmitter and antenna |
| Answer» B. Virtual height | |
| 3. |
Find the virtual height h when the angle of incidence is 600 and distance of separation 120km. |
| A. | 60km |
| B. | 64.34km |
| C. | 34.64km |
| D. | 72.42km |
| Answer» D. 72.42km | |
| 4. |
The differences in the virtual height and actual height are affected by the electron density in the ionosphere region. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Find the skip distance when the angle of incidence is 200 and virtual height is 50km? |
| A. | 13.22m |
| B. | 13.22km |
| C. | 36.33km |
| D. | 36.33m |
| Answer» D. 36.33m | |
| 6. |
Relation between skip distance d, virtual height d and MUF fMUF is ______ |
| A. | (d=2h sqrt{[ frac{f_{MUF}^2}{f_c^2}-1]} ) |
| B. | (h=2d sqrt{[ frac{f_{MUF}^2}{f_c^2}-1]} ) |
| C. | (d=2h( frac{f_{MUF}^2}{f_c^2}-1) ) |
| D. | (h=2d( frac{f_{MUF}^2}{f_c^2}-1) ) |
| Answer» B. (h=2d sqrt{[ frac{f_{MUF}^2}{f_c^2}-1]} ) | |
| 7. |
The effective height of a layer of ionized gas in the atmosphere by which the radio waves are reflected around earth s curvature is called Virtual height. |
| A. | True |
| B. | False |
| Answer» B. False | |