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. Under FCC Part 80 rules, what is the maximum permissible carrier power for a ship station operating on 2182 kHz?

    Answer: 400 watts

    FCC Part 80 limits ship station carrier power on 2182 kHz to 400 watts to prevent excessive interference on the distress frequency.

  2. What is the purpose of the Digital Selective Calling (DSC) controller used in GMDSS?

    Answer: To send automated distress and calling signals on designated frequencies

    DSC sends digital bursts containing MMSI, position, and distress nature on designated frequencies, automatically alerting Coast Guard and nearby vessels.

  3. What is the decibel gain of an antenna rated at 6 dBd relative to a half-wave dipole?

    Answer: 6 dB above a dipole, or about 8.15 dBi above an isotropic radiator

    dBd is gain referenced to a dipole; since a dipole has 2.15 dBi of gain, 6 dBd = 6 + 2.15 = 8.15 dBi above an isotropic radiator.

  4. What is the minimum watch requirement for a compulsorily equipped ship station under GMDSS while at sea?

    Answer: Watch on DSC Channel 70 and voice Channel 16 at all times

    GMDSS requires continuous automated DSC watch on Channel 70 (and/or MF/HF DSC) plus continuous voice watch on Channel 16 while underway.

  5. Which component in a PLL (Phase-Locked Loop) frequency synthesizer directly determines the output frequency?

    Answer: The voltage-controlled oscillator (VCO)

    The VCO generates the output frequency; the PLL feedback loop locks the VCO to a precise multiple of the stable reference frequency.

  6. If a marine SSB transmitter is producing intermodulation distortion products, what is the most likely cause?

    Answer: The final amplifier is being driven into a nonlinear (overdriven) region

    IMD products result when the final amplifier is overdriven past its linear range, causing mixing of two or more audio tones to create spurious emissions.

  7. What action should a GROL operator take if a ship's EPIRB activates inadvertently in port?

    Answer: Immediately report the false alert to the nearest Coast Guard authority and deactivate the EPIRB

    Inadvertent EPIRB activations must be reported immediately to the Coast Guard and cancelled to prevent unnecessary SAR resource deployment.