MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Radiation and Microwave Techniques knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The radar in which both transmission and reception is done using the same |
| A. | monostatic |
| B. | bistatic |
| C. | dipole radar |
| D. | monopole radar |
| Answer» B. bistatic | |
| 2. |
__________ system obtains information about a target by transmitting a signal |
| A. | radar |
| B. | sonar |
| C. | radiometer |
| D. | none of the above |
| Answer» B. sonar | |
| 3. |
A loss less line of characteristic impedance Z0 is terminated in pure reactance of - |
| A. | 10 |
| B. | 2 |
| C. | 1 |
| D. | infinity |
| Answer» E. | |
| 4. |
A magnetron whose oscillating frequency is electronically adjustable over a wide |
| A. | coaxial magnetron |
| B. | dither-tuned magnetron |
| C. | frequency agile magnetron |
| D. | vtm |
| Answer» E. | |
| 5. |
The phase velocity of an electrometric wave propagating in a hollow metallic |
| A. | equal to its group velocity |
| B. | less than velocity of light in free space |
| C. | equal to velocity of light in free space |
| D. | greater than velocity of light in free space |
| Answer» D. greater than velocity of light in free space | |
| 6. |
In a transmission line, if the SWR or maximum current to a minimum current |
| A. | 1:4 |
| B. | 4:1 |
| C. | 1:2 |
| D. | 2:1 |
| Answer» E. | |
| 7. |
Considering a coaxial transmission line, maximum voltage on the line divided by |
| A. | characteristic impedance |
| B. | iswr |
| C. | vswr |
| D. | inductive reactance |
| Answer» D. inductive reactance | |
| 8. |
A microwave tube amplifier uses an axial magnetic field and a radial electric field. |
| A. | reflex klystron |
| B. | coaxial magnetron |
| C. | travelling wave magnetron |
| D. | cfa |
| Answer» C. travelling wave magnetron | |
| 9. |
The load is properly matched with the transmission line if the standing wave ratio |
| A. | 50 |
| B. | 10 |
| C. | 5 |
| D. | 1 |
| Answer» E. | |
| 10. |
Indicate which one of the following modes do not exist in a rectangularresonant |
| A. | te110 |
| B. | tm110 |
| C. | te011 |
| D. | mt111 |
| Answer» B. tm110 | |
| 11. |
Indicate the false statement. The SWR on a transmission line is infinity; the line is |
| A. | a short circuit |
| B. | an open circuit |
| C. | a complex impedance |
| D. | pure reactance |
| Answer» D. pure reactance | |
| 12. |
. Consider an air filled rectangular waveguide with a cross – section of5 cm × 3 cm. |
| A. | 7.81 ghz |
| B. | 9.01 ghz |
| C. | 11.2 ghz |
| D. | 6.89 ghz |
| Answer» B. 9.01 ghz | |
| 13. |
A directional coupler with three or more holes is sometimes used in preference to |
| A. | because it is more efficient |
| B. | to increase coupling of signal |
| C. | to reduce spurious mode generation |
| D. | to increase the bandwidth of the system |
| Answer» D. to increase the bandwidth of the system | |
| 14. |
The TWT is sometimes preferred to the magnetron as a radar transmitter output |
| A. | capable of a longer duty cycle |
| B. | a more efficient bandwidth |
| C. | more broadband |
| D. | less noisy |
| Answer» B. a more efficient bandwidth | |
| 15. |
ency for |
| A. | 2.5 ghz |
| B. | 10 ghz |
| C. | 5 ghz |
| D. | 12.5 ghz |
| Answer» B. 10 ghz | |