Modulation, Transmission & Reception: DGCA Radio Telephony (R/T) questions

Question 1

Modulation means:

Accepted Answer

Superimposing the base signal on a carrier wave

Answer

Adding power to the transmitted wave

Answer

Mixing two identical waves

Answer

Increasing the amplitude of the voice

Question 2

Bandwidth equals:

Accepted Answer

Twice the audio frequency

Answer

Twice the radio frequency

Answer

Half of the carrier frequency

Answer

Equal to the modulation frequency

Question 3

The device that generates radio waves is called:

Accepted Answer

Oscillator

Answer

Amplifier

Answer

Modulator

Answer

Receiver

Question 4

Selectivity of a receiver refers to:

Accepted Answer

Rejecting unwanted frequencies

Answer

Detecting weak signals

Answer

Stability of output

Answer

Amplifying sound

Question 5

Sensitivity of a receiver is:

Accepted Answer

Ability to detect weak signals

Answer

Ability to reproduce signals clearly

Answer

Ability to maintain frequency

Answer

Ability to transmit stronger signal

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