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Avionics Practice Test: Transmission Lines
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This quiz covers transmission line basics, standing waves and transmission lines as circuit elements.
 

Avionics Practice Test: Transmission Lines
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25 Questions

1. The transmission line in which the resistive impedance is equal to the characteristic impedance is called _____
2. What is used as a surrounding for the solid center core in a coaxial cable?
3. The characteristics of an open transmission line are just the opposite of shorted transmission line with respect to what the generator sees.
4. What is the device that converts the balanced line to an unbalanced line called?
5. What type of transmission line is used to intentionally delay the signal?
6. What is the type of transmission line in which neither wire is connected to the ground?
7. What is the load on a transmission line?
8. Which of the following does not cause standing waves?
9. Microstrip and striplines can be made by using monolithic, thin-film, and hybrid IC techniques to produce ________
10. The characteristic impedance of a cable of length 1m is 50Ω. What is the characteristic impedance of the same cable of length 100m?
11. What is used between the two lead wires of a parallel transmission line?
12. Which of the following is not a requirement of transmission lines?
13. Which of the following is widely used for connecting coaxial cables test instruments?
14. The special transmission lines constructed on PCBs to act as tuned circuits is called as?
15. In a balanced line, noise is present in the transmission line but cancels at the receiver.
16. When does an open transmission line look like an inductor to the generator?
17. What is the phase difference between the current flowing in the two wires of a balanced line?
18. What percentage of power is reflected if the reflection coefficient is 0.5?
19. Two parallel lines appear as a complex impedance when the transmission line is equal to the wavelength of the signal.
20. Parallel conductors form a distributed inductance with the insulation.
21. What is the reflection coefficient If a line is terminated in its characteristic impedance?
22. How does a shorted transmission line appear to a generator whose length is a quarter of the wavelength?
23. When does a shorted transmission line look like an inductor to the generator?
24. For an operating frequency of 450 MHz, what length of a pair of conductors is considered to be a transmission line?
25. Which type of coaxial cable connector is the least expensive?

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