Elenco SEE AMFM108CK - Manual (Page 31)

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Answer s: 1. D , 2. D , 3. A, 4. A, 5. C , 6. A, 7. D, 8. A, 9. B , 10. D
1. The number of cycles produced per second by a
source of sound is called the ...
r
A) amplitude.
r
B) vibration.
r
C) sound wave.
r
D) frequency.
2. The radio frequencies used by AM broadcast
stations are between ...
r
A) 20kHz and 400kHz.
r
B) 5kHz and 20kHz.
r
C) 2400kHz and 6000kHz.
r
D) 550kHz and 1600kHz.
3. The process of removing the audio wave from
the radio wave is called ...
r
A) demodulation.
r
B) frequency reduction.
r
C) modulation.
r
D) vibrating.
4. When an electromagnetic wave (modulated radio
wave) passes an antenna, it ...
r
A) induces a voltage and current in the
antenna.
r
B) changes an audio wave into a radio
wave.
r
C) changes the carrier frequency.
r
D) produces sidebands.
5. The power of the signal transmitted by the
broadcast station and the distance, the signal
travelled from the transmitter to the receiver,
determine the ...
r
A) frequency of the modulation.
r
B) wavelength of the audio waves.
r
C) amount of signal picked up by the
antenna.
r
D) type of filter that is used.
6. When the two metal plates on a variable
capacitor are unmeshed the ...
r
A) capacitance is minimum.
r
B) capacitance is maximum.
r
C) capacitance is not affected.
r
D) inductance is increased.
7. The process of mixing two signals to produce a
third signal is called ...
r
A) filtering.
r
B) detecting.
r
C) rectification.
r
D) heterodyning.
8. The magic wand is used to determine ...
r
A) whether more or less inductance is
required in a tuned circuit.
r
B) whether more or less capacitance is
required in a tuned circuit.
r
C) the gain of an RF amplifier.
r
D) whether the oscillator is functioning.
9. The IF frequency of your AM radio is ...
r
A) 1600kHz.
r
B) 455kHz.
r
C) 550kHz.
r
D) 910kHz.
10. The purpose of the AGC circuit is to ...
r
A) automatically control the frequency of
the oscillator circuit.
r
B) control the band width of the IF stages.
r
C) reduce distortion in the audio circuit.
r D) maintain a constant audio level at the
detector, regardless of the strength of
the incoming signal.
QUIZ - AM SECTION
INSTRUCTIONS: Complete the following examination, check your answers carefully.