Ham Radio Technician Test Amateur 3

Question 1

What is the purpose of a CTCSS tone on a repeater?

Accepted Answer

To open the repeater only to signals carrying the correct subaudible tone

Answer

CTCSS (Continuous Tone-Coded Squelch System) causes the repeater to open only when it receives a signal that includes the correct subaudible tone.

Question 2

If you receive a distress call on a frequency you normally use, what should you do?

Accepted Answer

Acknowledge it and offer assistance or relay the call to emergency services

Answer

Amateur operators are expected to render assistance to a station in distress, including relaying information to emergency services.

Question 3

Which band is known as the '2-meter band' in amateur radio?

Accepted Answer

144–148 MHz

Answer

The 2-meter amateur band spans 144 to 148 MHz, named for the approximate wavelength of signals in that range.

Question 4

What is the primary purpose of an antenna tuner (antenna coupler)?

Accepted Answer

To match the impedance of the transmitter to the antenna system

Answer

An antenna tuner matches the impedance of the transmission line and antenna to the transceiver's output impedance, minimizing SWR.

Question 5

What does RF safety's 'duty cycle' refer to?

Accepted Answer

The percentage of time a transmitter is actually transmitting during an evaluation period

Answer

Duty cycle is the percentage of time a transmitter is actively transmitting, used to average RF exposure for safety evaluations.

Ham Radio Technician Test Practice Test