HAM FREE Ham Radio Extra Class MCQ Questions and Answers 2

Question 1

What is the purpose of a Smith chart in amateur radio?

Accepted Answer

To display complex impedance and admittance on a single graph

Answer

To calculate antenna gain in dBi

Answer

To measure SWR at multiple frequencies simultaneously

Answer

To plot signal propagation paths over terrain

Question 2

Which emission type designator indicates a single-sideband suppressed-carrier voice signal?

Accepted Answer

J3E

Answer

F3E

Answer

A1A

Answer

C3F

Question 3

What is the maximum symbol rate permitted for RTTY or data emission on the 20-meter band?

Accepted Answer

300 baud

Answer

1200 baud

Answer

9600 baud

Answer

56 kilobaud

Question 4

What is the typical noise figure of a well-designed preamplifier for weak-signal VHF work?

Accepted Answer

Less than 1 dB

Answer

About 6 dB

Answer

About 10 dB

Answer

Greater than 15 dB

Question 5

In a superheterodyne receiver, what causes an image frequency response?

Accepted Answer

A signal at twice the IF frequency away from the desired signal mixing to the same IF

Answer

Oscillator phase noise mixing with adjacent signals

Answer

Intermodulation distortion in the RF amplifier stage

Answer

Harmonic radiation from the local oscillator

Question 6

What is the function of a directional coupler in a transmitter system?

Accepted Answer

To sample forward and reflected power without interrupting the transmission line

Answer

To combine signals from multiple transmitters onto one antenna

Answer

To filter harmonic emissions before they reach the antenna

Answer

To switch between multiple antennas automatically