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. |
In which of the following scanning the phase of the radiators varies incrementally for scan? |
| A. | Phase scanning |
| B. | Frequency scanning |
| C. | IF scanning |
| D. | Beam forming |
| Answer» B. Frequency scanning | |
| 2. |
Which of the following is mainly used in electronic scanning? |
| A. | Phase shifters |
| B. | Amplifiers |
| C. | Repeaters |
| D. | Limiters |
| Answer» B. Amplifiers | |
| 3. |
In which of the following scanning the phase of the radiator is constant at one frequency? |
| A. | Phase scanning |
| B. | Frequency scanning |
| C. | Both Phase and frequency scanning |
| D. | Neither Frequency nor Phase scanning |
| Answer» C. Both Phase and frequency scanning | |
| 4. |
In which of the following type of scanning a heterodyne is used? |
| A. | IF Scanning |
| B. | Frequency scanning |
| C. | Phase scanning |
| D. | Digital beam-forming |
| Answer» B. Frequency scanning | |
| 5. |
In Frequency scanning, the phase of all radiators is constant for the frequency tuned at that instant |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Which of the following equation gives the incremental phase shift of the phase array radar with d element spacing and scan angle θ? |
| A. | \(ᴪ=\frac{2π}{λ} dsinθ\) |
| B. | \(ᴪ=\frac{2π}{d} λsinθ\) |
| C. | \(ᴪ=\frac{π}{λ} dsinθ\) |
| D. | \(ᴪ=\frac{π}{d} λsinθ\) |
| Answer» B. \(ᴪ=\frac{2π}{d} λsinθ\) | |
| 7. |
What is the phase shift of the array is the scan angle is 30° and spacing distance is λ/2? |
| A. | \(\frac{π}{2} \) |
| B. | π |
| C. | 2π |
| D. | \(\frac{π}{4} \) |
| Answer» B. π | |
| 8. |
Electronic scanning is more advantageous compared to mechanical scanning |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Which of the following principle is used in the phased array radar? |
| A. | Interference |
| B. | Diffraction |
| C. | Reflection |
| D. | Refraction |
| Answer» B. Diffraction | |
| 10. |
In which of the following a single radiator source is used to feed antenna with different phase shifts? |
| A. | Phased array |
| B. | FMCW radar |
| C. | Monopulse radar |
| D. | CW radar |
| Answer» B. FMCW radar | |