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 type of bias is required for an LED to emit light?
What three test loads are used to calibrate a standard RF vector network analyzer?
What is one advantage of using ASCII code for data communications?
What is the best time of day for transequatorial propagation?
What type of chart is shown in Figure E9-3?
What is one way a single-sideband phone signal can be generated?
Which of the following statements concerning remotely controlled amateur stations is true?
What is the name of the matching system that uses a section of transmission line connected in parallel with the feed line at or near the feed point?
Atmospheric ducts capable of propagating microwave signals often form over what geographic feature?
Orthogonal Frequency Division Multiplexing is a technique used for which type of amateur communication?
Which of the following amplifier types reduces or eliminates even order harmonics?
What is the necessary bandwidth of a 4800-Hz frequency shift, 9600-baud ASCII FM transmission?
What is the maximum permitted transmitter peak envelope power for an amateur station transmitting spread spectrum communications?
Which of these methods is commonly used to convert analog signals to digital signals?
What is the most common data rate used for HF packet?
What does the MDS of a receiver represent?
What must be done before placing an amateur station within an officially designated wilderness area or wildlife preserve, or an area listed in the National Register of Historical Places?
What type of signal is picked up by electrical wiring near a radio antenna?
What is a crystal lattice filter?
What is the primary reason that a high-frequency switching type high voltage power supply can be both less expensive and lighter in weight than a conventional power supply?
What impedance does a 1/2 wavelength transmission line present to a generator when the line is shorted at the far end?
Which of the following can cause receiver desensitization?
What letter is commonly used to represent susceptance?
Why are there separate electric (E) and magnetic (H) field MPE limits?
Which of the following is an aspect of the piezoelectric effect?
What is a disadvantage of using a multiband trapped antenna?
What does the value of Bz (B sub Z) represent?
What is meant by the term op-amp input offset voltage?
In the antenna radiation pattern shown in Figure E9-1, what is the front-to-back ratio?
What might help to restore contact when DX signals become too weak to copy across an entire HF band a few hours after sunset?
What are the majority charge carriers in N-type semiconductor material?
Which of the following is good practice when using an oscilloscope probe?
What is the primary advantage of tri-state logic?
Which of the following device packages is a through-hole type?
How many watts are consumed in a circuit having a power factor of 0.6 if the input is 200VAC at 5 amperes?
What is a vector?
What is the direction of a descending pass for an amateur satellite?
What logical operation does a NAND gate perform?
How can an oscillator's microphonic responses be reduced?
How much gain does an antenna have compared to a 1/2-wavelength dipole when it has 6 dB gain over an isotropic antenna?
Which of the following describes an extended double Zepp antenna?
To which of the following examinees may a VE not administer an examination?
What is the resonant frequency of a series RLC circuit if R is 22 ohms, L is 50 microhenrys and C is 40 picofarads?
Which of the following is a requirement of a space station?
With your transceiver displaying the carrier frequency of CW signals, you hear a DX station's CQ on 3.500 MHz. Is it legal to return the call using CW on the same frequency?
How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?
What is the triangulation method of direction finding?
Which of these materials is affected the most by photoconductivity?
How frequently must an analog signal be sampled by an analog-to-digital converter so that the signal can be accurately reproduced?
What is one advantage of using JT65 coding?