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.
What is the advantage of including a parity bit with an ASCII character stream?
What does a value of -174 dBm/Hz represent with regard to the noise floor of a receiver?
What is a Volunteer Examiner Coordinator?
What is the purpose of Q1 in the circuit shown in Figure E7-3?
What does a third-order intercept level of 40 dBm mean with respect to receiver performance?
What is the approximate bandwidth of a slow-scan TV signal?
Which of the following additional rules apply if you are installing an amateur station antenna at a site at or near a public use airport?
Which amateur service HF bands have frequencies authorized for space stations?
What occurs when an excessive amount of signal energy reaches a mixer circuit?
What impedance does a 1/2 wavelength transmission line present to a generator when the line is open at the far end?
What is the common name for a capacitor connected across a transformer secondary that is used to absorb transient voltage spikes?
What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?
If a station in a message forwarding system inadvertently forwards a message that is in violation of FCC rules, who is primarily accountable for the rules violation?
What is the failure mechanism when a junction diode fails due to excessive current?
What is the purpose of the prescaler function on a frequency counter?
What logical operation is performed by an exclusive NOR gate?
What do the initials CMOS stand for?
Which of the following materials is likely to provide the highest frequency of operation when used in MMICs?
What is the term for the ratio between the frequency deviation of an RF carrier wave and the modulating frequency of its corresponding FM-phone signal?
Who may be the control operator of an auxiliary station?
Which of the following describes a method to measure intermodulation distortion in an SSB transmitter?
What is "dither" with respect to analog to digital converters?
What is the direction of an ascending pass for an amateur satellite?
What do Hepburn maps predict?
What happens to the magnitude of a reactance when it is converted to a susceptance?
What is meant by antenna gain?
What is a use for a Wilkinson divider?
What might a sudden rise in radio background noise indicate?
How can an RF power amplifier be neutralized?
What is the far field of an antenna?
What is one advantage of using JT65 coding?
What is an advantage of Gray code in digital communications where symbols are transmitted as multiple bits
What is the efficiency of a photovoltaic cell?
Which of the following would provide the best RF ground for your station?
What is the effect of ringing in a filter?
What is transequatorial propagation?
Which is generally true for low band (160 meter and 80 meter) receiving antennas?
What are the major spectral impurity components of direct digital synthesizers?
What is the resonant frequency of a series RLC circuit if R is 22 ohms, L is 50 microhenrys and C is 40 picofarads?
When evaluating RF exposure levels from your station at a neighbor's home, what must you do?
How should you generally identify your station when attempting to contact a DX station during a contest or in a pileup?
What do the two numbers that are used to define a point on a graph using rectangular coordinates represent?
What is the primary advantage of using a Programmable Gate Array (PGA) in a logic circuit?
What are the distinguishing features of an elliptical filter?
What is a common method of generating an SSB signal using digital signal processing?
Which type of control is used by stations using the Automatic Link Enable (ALE) protocol?
Which of the following is required in order to operate in accordance with CEPT rules in foreign countries where permitted?
Which of the following types of receiver noise can often be reduced by use of a receiver noise blanker?
On the Smith chart shown in Figure E9-3, what is the only straight line shown?
What is reactive power?