Current Ham Radio Test Pools
Select the most correct answer for each question, then submit your practice test to check your score. This practice test randomly pulls one question from each topic in the Amateur Extra pool.
During a VHF/UHF contest, in which band segment would you expect to find the highest level of activity?
What is the most useful characteristic of a Zener diode?
Which type of slug material decreases inductance when inserted into a coil?
What three test loads are used to calibrate a standard RF vector network analyzer?
How is voltage from a power supply normally furnished to the most common type of monolithic microwave integrated circuit (MMIC)?
Which of the following oscillator circuits are commonly used in VFOs?
What class of licensee is authorized to be the control operator of a space station?
Which of the following best describes electromagnetic waves traveling in free space?
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 25 ohms, R is 100 ohms, and XL is 50 ohms?
What is a liquid crystal display (LCD)?
What might a sudden rise in radio background noise indicate?
What is the definition of symbol rate in a digital transmission?
For what portion of a signal cycle does a Class AB amplifier operate?
What undesirable effect can occur when using an IF noise blanker?
What happens as the Q of an antenna increases?
What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus-or-minus 5 kHz when the maximum modulation frequency is 3 kHz?
What privileges are authorized in the U.S. to persons holding an amateur service license granted by the Government of Canada?
What is the difference between direct FSK and audio FSK?
How can intermodulation interference between two repeaters occur?
What type of modulation is used for JT65 contacts?
What is the equivalent lumped-constant network for a hairpin matching system of a 3-element Yagi?
What absolute voltage gain can be expected from the circuit in Figure E7-4 when R1 is 1800 ohms and RF is 68 kilohms?
When may an automatically controlled station originate third party communications?
What is the purpose of Q1 in the circuit shown in Figure E7-3?
Which of the following choices is a good reason for selecting a high frequency for the design of the IF in a conventional HF or VHF communications receiver?
What is a characteristic of a monostable multivibrator?
Why is it important to keep lead lengths short for components used in circuits for VHF and above?
Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?
What impedance does a 1/2 wavelength transmission line present to a generator when the line is open at the far end?
Which of the following is an advantage of using vestigial sideband for standard fast- scan TV transmissions?
In the antenna radiation pattern shown in Figure E9-1, what is the front-to-side ratio?
What determines the PEP-to-average power ratio of a single-sideband phone signal?
What is the process of normalization with regard to a Smith chart?
What is the main drawback of a wire-loop antenna for direction finding?
What is the beta of a bipolar junction transistor?
What is meant by the term baseband in radio communications?
Which filter type is described as having ripple in the passband and a sharp cutoff?
When using rectangular coordinates to graph the impedance of a circuit, what does the vertical axis represent?
Which amateur bands typically support long-path propagation?
Why is an anti-aliasing digital filter required in a digital decimator?
What is the most common method of reducing key clicks?
Which of the following best describes the Volunteer Examiner accreditation process?
What can cause the voltage across reactances in series to be larger than the voltage applied to them?
How is the compensation of an oscilloscope probe typically adjusted?
On what band would a satellite receive signals if it were operating in mode U/V?
Which insulating material commonly used as a thermal conductor for some types of electronic devices is extremely toxic if broken or crushed and the particles are accidentally inhaled?
How is antenna efficiency calculated?
Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?
What is a folded dipole antenna?
What is the function of hysteresis in a comparator?