MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 15 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. |
In series stub matching, if the normalized impedance at a point on the transmission line to be matched is 1+j1.33. Then the reactance of the series stub used for matching is: |
| A. | 1 Ω |
| B. | -1.33 Ω |
| C. | -1 Ω |
| D. | 1.33 Ω |
| Answer» C. -1 Ω | |
| 2. |
After impedance matching, if a graph is plot with frequency v/s reflection co-efficient of the transmission line is done, then at the frequency point for which the design is done, which of the following is true? |
| A. | There is a peak at this point of the curve |
| B. | There is a dip at this point of the curve |
| C. | The curve is a straight line |
| D. | Such a plot cannot be obtained |
| Answer» C. The curve is a straight line | |
| 3. |
If the normalized admittance at a point on a transmission line to be matched is 1+j1.47. Then the normalized susceptance of the stub used for shunt stub matching is: |
| A. | 1Ω |
| B. | 1.47 Ω |
| C. | -1.47 Ω |
| D. | -1 Ω |
| Answer» D. -1 Ω | |
| 4. |
For a load impedance of ZL=60-j80. Design of 2 single-stub shunt tuning networks to match this load to a 50Ω line is to be done. What is the normalized admittance obtained so as to plot it on smith chart? |
| A. | 1+j |
| B. | 0.3+j0.4 |
| C. | 0.4+j0.3 |
| D. | 0.3-j0.4 |
| Answer» C. 0.4+j0.3 | |
| 5. |
The two adjustable parameters in single stub matching are distance‘d’ from the load to the stub position, and _________ |
| A. | Susceptance or reactance provided by the stub |
| B. | Length of the stub |
| C. | Distance of the stub from the generator |
| D. | None of the mentioned |
| Answer» B. Length of the stub | |
| 6. |
AFTER_IMPEDANCE_MATCHING,_IF_A_GRAPH_IS_PLOT_WITH_FREQUENCY_V/S_REFLECTION_CO-EFFICIENT_OF_THE_TRANSMISSION_LINE_IS_DONE,_THEN_AT_THE_FREQUENCY_POINT_FOR_WHICH_THE_DESIGN_IS_DONE,_WHICH_OF_THE_FOLLOWING_IS_TRUE??$ |
| A. | There is a peak at this point of the curve |
| B. | There is a dip at this point of the curve |
| C. | The curve is a straight line |
| D. | Such a plot cannot be obtained |
| Answer» C. The curve is a straight line | |
| 7. |
In_series_stub_matching,_if_the_normalized_impedance_at_a_point_on_the_transmission_line_to_be_matched_is_1+j1.33._Then_the_reactance_of_the_series_stub_used_for_matching_is:$ |
| A. | 1 Ω |
| B. | -1.33 Ω |
| C. | -1 Ω |
| D. | 1.33 Ω |
| Answer» C. -1 ‚âà√≠¬¨¬© | |
| 8. |
If the normalized admittance at a point on a transmission line to be matched is 1+j1.47. Then the normalized susceptance of the stub used for shunt stub matching is? |
| A. | 1Ω |
| B. | 1.47 Ω |
| C. | -1.47 Ω |
| D. | -1 Ω |
| Answer» D. -1 ‚âà√≠¬¨¬© | |
| 9. |
For a load impedance of ZL=60-j80. Design of 2 single-stub shunt tuning networks to match this load to a 50Ω line is to be done. What is the normalized admittance obtained so as to plot it on smith chart?$ |
| A. | 1+j |
| B. | 0.3+j0.4 |
| C. | 0.4+j0.3 |
| D. | 0.3-j0.4 |
| Answer» C. 0.4+j0.3 | |
| 10. |
For co-axial lines and waveguides, ________ is more preferred. |
| A. | Open circuited stub |
| B. | Short circuited stub |
| C. | Slotted section |
| D. | Co-axial lines cannot be impedance matched |
| Answer» C. Slotted section | |
| 11. |
For series stub matching, the parameter used for matching is: |
| A. | Impedance of the transmission line at a point |
| B. | Voltage at a point on the transmission line |
| C. | Admittance at a point on the transmission line |
| D. | Admittance of the load |
| Answer» B. Voltage at a point on the transmission line | |
| 12. |
In shunt stub matching, the key parameter used for matching is: |
| A. | Admittance of the line at a point |
| B. | Admittance of the load |
| C. | Impedance of the stub |
| D. | Impedance of the load |
| Answer» B. Admittance of the load | |
| 13. |
The two adjustable parameters in single stub matching are distance‘d’ from the load to the stub position, and _________$ |
| A. | Susceptance or reactance provided by the stub |
| B. | Length of the stub |
| C. | Distance of the stub from the generator |
| D. | None of the mentioned |
| Answer» B. Length of the stub | |
| 14. |
Shunt stubs are preferred for: |
| A. | Strip and microstrip lines |
| B. | Coplanar waveguides |
| C. | Circular waveguide |
| D. | Circulators |
| Answer» B. Coplanar waveguides | |
| 15. |
The major advantage of single stub tuning over other impedance matching techniques is: |
| A. | Lumped elements are avoided |
| B. | It can be fabricated as a part of transmission line media |
| C. | It involves two adjustable parameters |
| D. | All of the mentioned |
| Answer» E. | |