Extra Class
The highest level of amateur radio license with full operating privileges on all amateur bands. Most technical exam. 50 questions, 37 needed to pass.
Which of the following describes an optical shaft encoder?
Which of these materials is most commonly used to create photoconductive devices?
What is a solid-state relay?
Why are optoisolators often used in conjunction with solid-state circuits that control 120 VAC circuits?
What is the efficiency of a photovoltaic cell?
What is the most common material used in power-generating photovoltaic cells?
What is the approximate open-circuit voltage produced by a fully illuminated silicon photovoltaic cell?
Which circuit is bistable?
What is the function of a decade counter?
Which of the following can divide the frequency of a pulse train by 2?
How many flip-flops are required to divide a signal frequency by 16?
Which of the following circuits continuously alternates between two states without an external clock signal?
What is a characteristic of a monostable multivibrator?
What logical operation does a NAND gate perform?
What logical operation does an OR gate perform?
What logical operation is performed by a two-input exclusive NOR gate?
What is a truth table?
What does “positive logic” mean in reference to logic devices?
For what portion of the signal cycle does each active element in a push-pull, Class AB amplifier conduct?
What is a Class D amplifier?
HAM Test Bank Editorial Team
Licensed Amateur Radio Operators & Volunteer Examiners
Content for Extra Class exam questions is based on official FCC Part 97 regulations and the NCVEC question pool.