MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Reflector Antenna knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In a paraboloid antenna, all rays leaving the focal point are collimated along the reflector s axis after reflection. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Which of the following is used to produce wide beam in one plane and narrow beam in other plane? |
| A. | Pill box |
| B. | Truncated paraboloid |
| C. | Cassegrain |
| D. | Paraboloid with rectangular aperture |
| Answer» B. Truncated paraboloid | |
| 3. |
Which of the following paraboloid reflector is formed by cutting some part of paraboloid to meet requirements? |
| A. | Truncated paraboloid |
| B. | Cassegrain |
| C. | Corner |
| D. | Pill box |
| Answer» B. Cassegrain | |
| 4. |
Which of the following is false regarding a paraboloid antenna? |
| A. | Spill over decreases due to back lobe of primary radiator |
| B. | Feed placed at the focus is used to improve the beam pattern |
| C. | Pill box provides wide beam in one plane and narrow beam in other plane |
| D. | At lower frequencies parabolic antennas are not used frequently |
| Answer» B. Feed placed at the focus is used to improve the beam pattern | |
| 5. |
What is the ratio of focal length to diameter for practical applications in a parabolic reflector? |
| A. | 0.25 to 0.5 |
| B. | < 0.25 |
| C. | 0.125 to 0.3 |
| D. | 0.5 to 1 |
| Answer» B. < 0.25 | |
| 6. |
Find the BWFN of a paraboloid with a circular aperture of diameter 10 ? |
| A. | 14 degrees |
| B. | 28 degrees |
| C. | 11.5 degrees |
| D. | 41 degrees |
| Answer» B. 28 degrees | |
| 7. |
BWFN of a paraboloid antenna with circular aperture assuming feed is isotropic is ____ |
| A. | ( frac{140 }{d} ) |
| B. | ( frac{115 }{d} ) |
| C. | ( frac{58 }{d} ) |
| D. | ( frac{40 }{d} ) |
| Answer» B. ( frac{115 }{d} ) | |
| 8. |
Find the aperture ratio of the paraboloid with aperture diameter 1m at 1.5GHz frequency? |
| A. | 5 |
| B. | 0.2 |
| C. | 1.5 |
| D. | 7.5 |
| Answer» B. 0.2 | |
| 9. |
The power gain of the parabolic reflector with circular aperture of diameter 10 ? |
| A. | 100 |
| B. | 10 |
| C. | 600 |
| D. | 360 |
| Answer» D. 360 | |
| 10. |
Which of the following wave conversion mechanism is performed in a parabolic reflector antenna? |
| A. | Plane to spherical |
| B. | Spherical to plane |
| C. | Performs both plane to spherical and spherical to plane |
| D. | Elliptic polarization |
| Answer» C. Performs both plane to spherical and spherical to plane | |