What is the velocity factor of a transmission line?

1. A The ratio of its characteristic impedance to its termination impedance
2. B The ratio of its termination impedance to its characteristic impedance
3. C The velocity of a wave in the transmission line multiplied by the velocity of light in a vacuum
4. D The velocity of a wave in the transmission line divided by the velocity of light in a vacuum

Which of the following has the biggest effect on the velocity factor of a transmission line?

1. A The characteristic impedance
2. B The transmission line length
3. C The insulating dielectric material
4. D The center conductor resistivity

Why is the electrical length of a coaxial cable longer than its physical length?

1. A Skin effect is less pronounced in the coaxial cable
2. B Skin effect is more pronounced in the coaxial cable
3. C Electromagnetic waves move faster in coaxial cable than in air
4. D Electromagnetic waves move more slowly in a coaxial cable than in air

What impedance does a 1/2-wavelength transmission line present to an RF generator when the line is shorted at the far end?

1. A Very high impedance
2. B Very low impedance
3. C The same as the characteristic impedance of the line
4. D The same as the output impedance of the RF generator

What is microstrip?

1. A Special shielding material designed for microwave frequencies
2. B Miniature coax used for low power applications
3. C Short lengths of coax mounted on printed circuit boards to minimize time delay between microwave circuits
4. D Precision printed circuit conductors above a ground plane that provide constant impedance interconnects at microwave frequencies

What is the approximate physical length of an air-insulated, parallel conductor transmission line that is electrically 1/2 wavelength long at 14.10 MHz?

1. A 7.0 meters
2. B 8.5 meters
3. C 10.6 meters
4. D 13.3 meters

How does parallel conductor transmission line compare to coaxial cable with a plastic dielectric?

1. A Lower loss
2. B Higher SWR
3. C Smaller reflection coefficient
4. D Lower velocity factor

Which of the following is a significant difference between foam dielectric coaxial cable and solid dielectric coaxial cable, assuming all other parameters are the same?

1. A Foam dielectric coaxial cable has lower safe maximum operating voltage
2. B Foam dielectric coaxial cable has lower loss per unit of length
3. C Foam dielectric coaxial cable has higher velocity factor
4. D All these choices are correct

What impedance does a 1/4-wavelength transmission line present to an RF generator when the line is shorted at the far end?

1. A Very high impedance
2. B Very low impedance
3. C The same as the characteristic impedance of the transmission line
4. D The same as the generator output impedance

What impedance does a 1/8-wavelength transmission line present to an RF generator when the line is shorted at the far end?

1. A A capacitive reactance
2. B The same as the characteristic impedance of the line
3. C An inductive reactance
4. D Zero

What impedance does a 1/8-wavelength transmission line present to an RF generator when the line is open at the far end?

1. A The same as the characteristic impedance of the line
2. B An inductive reactance
3. C A capacitive reactance
4. D Infinite

What impedance does a 1/4-wavelength transmission line present to an RF generator when the line is open at the far end?

1. A The same as the characteristic impedance of the line
2. B The same as the input impedance to the generator
3. C Very high impedance
4. D Very low impedance