Exercise: Radio Receivers

Questions for: Radio Receivers

Which of the following statement about receivers is false?
A:
Double conversion is used to improve image rejection
B:
Double conversion is used to improve selectivity
C:
Variable sensitivity is used to improve selectivity
D:
Variable sensitivity is used to eliminate selective fading
Answer: D
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EM 84 tube is used in radio receivers as
A:
audio amplifier
B:
RF amplifier
C:
full wave rectifier
D:
magic eye
Answer: D
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If the intermediate frequency of a superheterodyne receiver falls within the tuning range of the receiver
A:
Unsuitability will occur
B:
Heterodyne whistles will be heard
C:
Tuning to the frequency band immediately adjacent to the intermediate frequency will become impossible
D:
All of the above
Answer: D
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The selectivity of a radio receiver is
A:
its ability to reject adjacent unwanted signals
B:
its ability to amplify weak signals
C:
the frequency at which it gives maximum amplification to signal.
D:
its ability to suppress noise.
Answer: A
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Which of the following is used to provide tracking between RF amplifier and local oscillator stages of receiver?
A:
Variable tuning inductor
B:
Ganged tuning inductor
C:
Variable capacitor
D:
Variable preset
Answer: B
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