Amateur Flashcards
7 cards from real Ham Radio Technician Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Amateur flashcards as text
What is the purpose of a CTCSS tone on a repeater?
Answer: To open the repeater only to signals carrying the correct subaudible tone
CTCSS (Continuous Tone-Coded Squelch System) causes the repeater to open only when it receives a signal that includes the correct subaudible tone.
If you receive a distress call on a frequency you normally use, what should you do?
Answer: Acknowledge it and offer assistance or relay the call to emergency services
Amateur operators are expected to render assistance to a station in distress, including relaying information to emergency services.
Which band is known as the '2-meter band' in amateur radio?
Answer: 144–148 MHz
The 2-meter amateur band spans 144 to 148 MHz, named for the approximate wavelength of signals in that range.
What is the primary purpose of an antenna tuner (antenna coupler)?
Answer: To match the impedance of the transmitter to the antenna system
An antenna tuner matches the impedance of the transmission line and antenna to the transceiver's output impedance, minimizing SWR.
What does RF safety's 'duty cycle' refer to?
Answer: The percentage of time a transmitter is actually transmitting during an evaluation period
Duty cycle is the percentage of time a transmitter is actively transmitting, used to average RF exposure for safety evaluations.
Which of the following frequencies is in the Technician class HF phone (voice) allocation?
Answer: 28.300 MHz
Technician licensees have phone privileges on 28.300–28.500 MHz in the 10-meter band.
What is the function of a 'squelch' control on a VHF/UHF transceiver?
Answer: To silence the receiver when no signal above a set threshold is present
The squelch control mutes the receiver's audio output when received signals fall below a set threshold, eliminating background noise.