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. |
During night hours, Ionosphere consists of how many layers? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 2. |
Stratosphere is present at _____ from earth surface. |
| A. | 20- 70km |
| B. | 2-15km |
| C. | 150-400km |
| D. | Above 400km |
| Answer» B. 2-15km | |
| 3. |
Which of the following layer is used mostly for the long distance communication? |
| A. | Troposphere |
| B. | Stratosphere |
| C. | Ionosphere |
| D. | D layer during night hours |
| Answer» D. D layer during night hours | |
| 4. |
Ionospheric reflections in the shape of M –type occurs between Es and D layers |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
Which of the following is the top region during night hours in ionosphere? |
| A. | D layer |
| B. | E layer |
| C. | F2 layer |
| D. | F layer |
| Answer» E. | |
| 6. |
G region is also known as _______ |
| A. | Outer atmosphere |
| B. | Appleton layer |
| C. | Kennelly Heaviside layer |
| D. | Absorption layer |
| Answer» B. Appleton layer | |
| 7. |
In stratosphere, the excess refractive index is given as ________ in terms of refractive index μ. |
| A. | N=(μ-1)×10-6 |
| B. | N=(μ-1)×106 |
| C. | N=(1+μ)×10-6 |
| D. | N=(μ+1)×106 |
| Answer» B. N=(μ-1)×106 | |
| 8. |
In which of the following layer of atmosphere free electrons and ions are present? |
| A. | Troposphere |
| B. | Stratosphere |
| C. | Ionosphere |
| D. | Outer atmosphere |
| Answer» D. Outer atmosphere | |
| 9. |
What is the range of the region of calm from the earth surface? |
| A. | 20- 70km |
| B. | 2-15km |
| C. | 150-400km |
| D. | Above 400km |
| Answer» B. 2-15km | |
| 10. |
Which of the following is the lowest layer of atmosphere? |
| A. | Troposphere |
| B. | Stratosphere |
| C. | Ionosphere |
| D. | Outer atmosphere |
| Answer» B. Stratosphere | |