Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

1. A A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
2. B A vertical antenna placed between 1/4 and 1/2 wavelength above the ground
3. C A horizontal dipole placed at approximately 1/2 wavelength above the ground
4. D A vertical dipole placed at approximately 1/2 wavelength above the ground

What is the feed point impedance of an end-fed half-wave antenna?

1. A Very low
2. B Approximately 50 ohms
3. C Approximately 300 ohms
4. D Very high

In which direction is the maximum radiation from a VHF/UHF "halo" antenna?

1. A Broadside to the plane of the halo
2. B Opposite the feed point
3. C Omnidirectional in the plane of the halo
4. D On the same side as the feed point

What is the primary function of antenna traps?

1. A To enable multiband operation
2. B To notch spurious frequencies
3. C To provide balanced feed point impedance
4. D To prevent out-of-band operation

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

1. A It allows quick selection of vertical or horizontal polarization
2. B It allows simultaneous vertical and horizontal polarization
3. C It narrows the main lobe in azimuth
4. D It narrows the main lobe in elevation

Which of the following is an advantage of a log-periodic antenna?

1. A Wide bandwidth
2. B Higher gain per element than a Yagi antenna
3. C Harmonic suppression
4. D Polarization diversity

Which of the following describes a log-periodic antenna?

1. A Element length and spacing vary logarithmically along the boom
2. B Impedance varies periodically as a function of frequency
3. C Gain varies logarithmically as a function of frequency
4. D SWR varies periodically as a function of boom length

How does a "screwdriver" mobile antenna adjust its feed point impedance?

1. A By varying its body capacitance
2. B By varying the base loading inductance
3. C By extending and retracting the whip
4. D By deploying a capacitance hat

What is the primary use of a Beverage antenna?

1. A Directional receiving for MF and low HF bands
2. B Directional transmitting for low HF bands
3. C Portable direction finding at higher HF frequencies
4. D Portable direction finding at lower HF frequencies

In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

1. A In the plane of the loop
2. B Broadside to the loop
3. C Broadside and in the plane of the loop
4. D Electrically small loops are omnidirectional

Which of the following is a disadvantage of multiband antennas?

1. A They present low impedance on all design frequencies
2. B They must be used with an antenna tuner
3. C They must be fed with open wire line
4. D They have poor harmonic rejection

What is the common name of a dipole with a single central support?

1. A Inverted V
2. B Inverted L
3. C Sloper
4. D Lazy H