FREE Ham Radio Extra Class MCQ Questions and Answers

Question 1

Why should an amateur transmitter generally steer clear of 14.100, 18.110, 21.150, 24.930, and 28.200 MHz frequencies?

Accepted Answer

A system of propagation beacon stations operates on those frequencies

Answer

These frequencies are set aside for emergency operations

Answer

These frequencies are set aside for bulletins from the FCC

Answer

A system of automatic digital stations operates on those frequencies

Question 2

What does the sunspot number mean in terms of HF transmission?

Accepted Answer

Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies

Answer

A zero sunspot number indicates undisturbed conditions

Answer

A zero sunspot number indicates that radio propagation is not possible on any band

Answer

Lower sunspot numbers generally indicate greater probability of sporadic E propagation

Question 3

Which 80-meter band frequency is most frequently utilized for digital transmissions?

Accepted Answer

3570-3600 kHz

Answer

3775-3825 kHz

Answer

3500-3525 kHz

Answer

3700-3750 kHz

Question 4

What function does the corona ball on an HF mobile antenna serve?

Accepted Answer

To reduce RF voltage discharge from the tip of the antenna while transmitting

Answer

To narrow the operating bandwidth of the antenna

Answer

To increase the "Q" of the antenna

Answer

To reduce the chance of damage if the antenna should strike an object

Question 5

What does "QRV" in the Q signal mean?

Accepted Answer

I am ready to receive messages

Answer

There is interference on the frequency

Answer

I am quitting for the day

Answer

You are sending too fast

Question 6

Which RTTY or data emission transmissions are allowed to use the highest symbol rate on the 10-meter band?

Accepted Answer

1200 baud

Answer

19.6 kilobaud

Answer

300 baud

Answer

56 kilobaud

Question 7

Which of the following might result in interference across a broad spectrum of frequencies?

Accepted Answer

Arcing at a poor electrical connection

Answer

Using a balun to feed an unbalanced antenna

Answer

Not using a balun or line isolator to feed balanced antennas

Answer

Lack of rectification of the transmitter's signal in power conductors