MCQOPTIONS
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MCQOPTIONS
This section includes 9 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 Polarization-twist reflector, sub-reflector consists of a horizontal grating of wires. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Which of the following condition holds good for minimum total aperture blocking in Cassegrain? |
| A. | Area of sub-reflector and projected area of feed are equal |
| B. | Area of primary reflector and projected area of feed are equal |
| C. | Area of sub-reflector greater than area of primary reflector |
| D. | Area of sub-reflector is less than projected area of feed |
| Answer» B. Area of primary reflector and projected area of feed are equal | |
| 3. |
Which of the following is not used for aperture blocking? |
| A. | Reducing size of sub-reflector |
| B. | Offset feed system |
| C. | High directive feed |
| D. | Reducing spillover |
| Answer» D. Reducing spillover | |
| 4. |
In which of the following a sub-reflector called trans-reflector is present? |
| A. | Polarization-twist reflector |
| B. | Plane reflector |
| C. | Cassegrain |
| D. | Gregorian |
| Answer» B. Plane reflector | |
| 5. |
In which of the following the aperture blocking is reduced by permitting antenna to operate in a single polarization? |
| A. | Truncated reflector |
| B. | Cassegrain |
| C. | Polarization-twist reflector |
| D. | Plane reflector |
| Answer» D. Plane reflector | |
| 6. |
Which of the following statement is true regarding a Gregorian antenna? |
| A. | Sub-reflector ellipsoidal lies closer to the focus of the paraboloid |
| B. | Sub-reflector is a hyperboloid with its convex facing feed |
| C. | Sub-reflector is an ellipsoidal with its concave facing reflector |
| D. | Sub-reflector is an ellipsoidal with its concave facing feed |
| Answer» D. Sub-reflector is an ellipsoidal with its concave facing feed | |
| 7. |
In which of the following the secondary reflector faces the primary reflector? |
| A. | Cassegrain |
| B. | Gregorian |
| C. | Corner reflector |
| D. | Plane reflector |
| Answer» C. Corner reflector | |
| 8. |
Which of the following causes aperture blockage in a Cassegrain antenna? |
| A. | Main reflector |
| B. | Sub-reflector |
| C. | Feed radiator |
| D. | Noise from surroundings |
| Answer» C. Feed radiator | |
| 9. |
Which of the following is used to avoid the aperture blockage due to secondary reflector? |
| A. | Offset feed system |
| B. | Cassegrain |
| C. | Plane reflector |
| D. | Parabolic antenna |
| Answer» B. Cassegrain | |