Practice Test Geeks(GROL) General Radiotelephone Operator License Practice Test
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General Radiotelephone Flashcards

7 cards from real GROL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 General Radiotelephone flashcards as text

  1. What is the primary purpose of the Global Maritime Distress and Safety System (GMDSS)?

    Answer: To automate distress alerting and improve coordination of SAR operations

    GMDSS automates distress alerting using DSC, EPIRBs, and satellite systems to rapidly coordinate search-and-rescue operations.

  2. What is the internationally designated distress frequency for MF (medium frequency) radiotelephony?

    Answer: 2182 kHz

    2182 kHz is the international distress and calling frequency for MF radiotelephony, used for watch-keeping at sea.

  3. In a superheterodyne receiver, what is the purpose of the IF (intermediate frequency) stage?

    Answer: To amplify and filter the signal at a fixed, lower frequency for better selectivity

    The IF stage amplifies and filters the down-converted signal at a constant frequency, providing consistent selectivity and gain.

  4. Which antenna has a radiation pattern that is omnidirectional in the horizontal plane?

    Answer: Vertical whip antenna

    A vertical whip antenna radiates equally in all horizontal directions, making it ideal for ship and land mobile use.

  5. What does the term 'selectivity' refer to in a radio receiver?

    Answer: The ability to reject adjacent channel interference

    Selectivity is the receiver's ability to separate the desired signal from nearby interfering signals on adjacent frequencies.

  6. What safety precaution must be observed when working on a transmitter's high-voltage power supply?

    Answer: Work with one hand in your pocket to avoid creating a path across the chest

    Keeping one hand in your pocket prevents current from flowing through your chest (heart) if you contact a high-voltage point.

  7. What is the main advantage of using SSB over double-sideband AM for long-distance voice communication?

    Answer: SSB requires less bandwidth and transmits all power in one sideband

    SSB suppresses the carrier and one sideband, reducing bandwidth by half and concentrating all transmitter power into the voice-modulated sideband.