MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the length of aperture in a pyramidal horn antenna is 10cm and δ for the design is 0.25. Then, the flaring angle of the pyramidal horn is: |
| A. | 30⁰ |
| B. | 25.4⁰ |
| C. | 45⁰ |
| D. | 60⁰ |
| Answer» C. 45⁰ | |
| 2. |
The terminal impedance of a dipole antenna is 710 Ω. The terminal impedance of the slot antenna given the intrinsic impedance of air is 377 Ω is: |
| A. | 100 Ω |
| B. | 50 Ω |
| C. | 25 Ω |
| D. | None of the mentioned |
| Answer» C. 25 Ω | |
| 3. |
______ antennas have gain less than reflector antennas but have more lenient tolerance on surfaces. |
| A. | Helical antennas |
| B. | Lens antennas |
| C. | Array antennas |
| D. | Slot antennas |
| Answer» C. Array antennas | |
| 4. |
LENS_ANTENNAS_ARE_CLASSIFIED_INTO_TWO_TYPES._ONE_BEING_FAST_ANTENNA,_THE_OTHER_ONE_IS:?$ |
| A. | Slow antenna |
| B. | Delay antenna |
| C. | Dynamic antenna |
| D. | None of the mentioned |
| Answer» C. Dynamic antenna | |
| 5. |
High directivity required in RADAR communication is satisfied using this type of antennas:$ |
| A. | Wide band antennas |
| B. | Antenna arrays |
| C. | Slot antennas |
| D. | Patch antennas |
| Answer» C. Slot antennas | |
| 6. |
The_antennas_which_offer_high_operational_bandwidth_and_the_antenna_parameters_are_maintained_over_a_wide_range_of_antennas_are_called:$ |
| A. | Wide band antennas |
| B. | Array antennas |
| C. | Parabolic antennas |
| D. | None of the mentioned |
| Answer» B. Array antennas | |
| 7. |
If the directivity of a square corner receiving antenna is 20 and operating at a wavelength of 0.25m, the effective aperture of a square corner antenna is: |
| A. | 0.4 m<sup>2</sup> |
| B. | 0.2 m<sup>2</sup> |
| C. | 0.1 m<sup>2</sup> |
| D. | None of the mentioned |
| Answer» B. 0.2 m<sup>2</sup> | |
| 8. |
If the length of aperture in a pyramidal horn antenna is 10cm and δ for the design is 0.25. Then, the flaring angle of the pyramidal horn is:$ |
| A. | 30‚Äö√Ö‚àû |
| B. | 25.4‚Äö√Ö‚àû |
| C. | 45‚Äö√Ö‚àû |
| D. | 60‚Äö√Ö‚àû |
| Answer» C. 45‚Äö√Ñ√∂‚àö√ñ‚Äö√†√ª | |
| 9. |
The_terminal_impedance_of_a_dipole_antenna_is_710_Ω._The_terminal_impedance_of_the_slot_antenna_given_the_intrinsic_impedance_of_air_is_377_Ω_is:$ |
| A. | 100 Ω |
| B. | 50 Ω |
| C. | 25 Ω |
| D. | None of the mentioned |
| Answer» C. 25 ‚âà√≠¬¨¬© | |
| 10. |
______ antennas have gain less than reflector antennas but have more lenient tolerance on surfaces? |
| A. | Helical antennas |
| B. | Lens antennas |
| C. | Array antennas |
| D. | Slot antennas |
| Answer» C. Array antennas | |
| 11. |
The pattern of the reflector in a reflector antenna is called: |
| A. | Primary pattern |
| B. | Secondary pattern |
| C. | Reflector pattern |
| D. | None of the mentioned |
| Answer» C. Reflector pattern | |
| 12. |
Reflector antennas are widely used to modify radiation patterns of radiating elements. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Patch antennas are the antennas of small size and are made of: |
| A. | Strip line |
| B. | Microstrip lines |
| C. | Coaxial cables |
| D. | Rectangular waveguide |
| Answer» C. Coaxial cables | |
| 14. |
Antenna that does not belong to the horn antenna family among the following are: |
| A. | Pyramidal horn |
| B. | Conical horn |
| C. | bi-conical horn |
| D. | None of the mentioned |
| Answer» E. | |
| 15. |
Based on the size of the loops, loop antennas are classified as small and large loops. This is the only classification of loop antenna. |
| A. | True |
| B. | False |
| Answer» C. | |
| 16. |
The antenna in which location of the feed determines the direction of the lobe are: |
| A. | Wire antenna |
| B. | Loop antenna |
| C. | Helical antenna |
| D. | Horn antenna |
| Answer» B. Loop antenna | |
| 17. |
The members of the antenna family which are made of wires of certain value in terms of operating wavelength are called: |
| A. | Loop antennas |
| B. | Wire antennas |
| C. | Dipole antenna |
| D. | Slot antennas |
| Answer» D. Slot antennas | |