MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Avionics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A microstrip transmission line is to be used as a capacitor of 4 pF at 800 MHz. The PCB dielectric is 3.6. The microstrip dimensions are h = 0.0625 in, w = 0.13 in, and t = 0.002 in. What is the characteristic impedance of the line? |
| A. | 48.9 |
| B. | 12.3 |
| C. | 54.3 |
| D. | 65.7 |
| Answer» B. 12.3 | |
| 2. |
Microstrip and striplines can be made by using monolithic, thin-film, and hybrid IC techniques to produce ________ |
| A. | Micro circuits |
| B. | Microwave integrated circuits |
| C. | Nano circuits |
| D. | Embedded circuits |
| Answer» C. Nano circuits | |
| 3. |
What is the transmission line in which a flat conductor is sandwiched between two ground planes? |
| A. | Microstrip |
| B. | Stripline |
| C. | Coaxial line |
| D. | Balanced line |
| Answer» C. Coaxial line | |
| 4. |
What is the characteristic impedance of microstrip with the dimensions h = 0.0625 in, w = 0.1 in, t = 0.003 in, and = 4.5? |
| A. | 84.35 |
| B. | 42.6 |
| C. | 53.9 |
| D. | 65.21 |
| Answer» D. 65.21 | |
| 5. |
Which of the following is not true with respect to microstrip? |
| A. | Used for transmission in UHF and microwave region |
| B. | Copper is etched on an insulating base material |
| C. | Point to point communications with wire are eliminated |
| D. | Microstrip is ever onequarter or one-half wavelength long. |
| Answer» E. | |
| 6. |
The special transmission lines constructed on PCBs to act as tuned circuits is called as? |
| A. | Stripline |
| B. | Loop lines |
| C. | Printed lines |
| D. | Transmission lines |
| Answer» B. Loop lines | |
| 7. |
The impedance of a line is zero when ___________ |
| A. | It acts as inductor |
| B. | It acts as capacitor |
| C. | It acts as a resistor |
| D. | Series resonant circuit |
| Answer» E. | |
| 8. |
When does an open transmission line look like an inductor to the generator? |
| A. | Length is one quarter wavelength |
| B. | Length is between one quarter and one half of wavelength |
| C. | Length is more the one half of the wavelength |
| D. | At all times |
| Answer» C. Length is more the one half of the wavelength | |
| 9. |
The characteristics of an open transmission line are just the opposite of shorted transmission line with respect to what the generator sees. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
When does a shorted transmission line look like an inductor to the generator? |
| A. | Length is one quarter wavelength |
| B. | Length is between one quarter and one half of wavelength |
| C. | Length is more the one half of the wavelength |
| D. | At all times |
| Answer» B. Length is between one quarter and one half of wavelength | |
| 11. |
When a shorted line does looks like a series resonant circuit to the generator? |
| A. | Length of line is one quarter wavelength |
| B. | Length of line is one half wave lengths |
| C. | Sorted line |
| D. | Open line |
| Answer» C. Sorted line | |
| 12. |
How does a shorted transmission line appear to a generator whose length is a quarter of the wavelength? |
| A. | Very high impedance |
| B. | Very low impedance |
| C. | Short circuited line |
| D. | RC tuned circuit |
| Answer» B. Very low impedance | |