GROL Practice Test: FCC Element 3 Question Pool

Every question in the FCC Element 3 pool, word for word, with the 17 circuit drawings. The real test is 100 of these, one from each key topic, and you need 75 right. Pass Element 1 and Element 3, and the GROL is yours for life.

The real test: 100 questions. 75 right (75%) passes.

Here: 599 questions. FCC Commercial Element 3 Question Pool (General Radiotelephone), approved 25 June 2009, US government work. Free.

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What's on the test

TopicOn the testIn the guide
Principles848
Electrical Math1060
Components1060
Circuits424
Digital Logic848
Receivers1060
Transmitters636
Modulation318
Power Sources318
Antennas530
Aircraft636
Installation, Maintenance & Repair848
Communications Technology318
Marine530
RADAR530
Satellite424
SAFETY211

The exam takes one question from each group of the pool, so the count per topic is fixed.

10 sample questions

  1. The product of the readings of an AC voltmeter and AC ammeter is called:

    • A.Apparent power.
    • B.True power.
    • C.Power factor.
    • D.Current power.
    Show answer

    A. Apparent power.

    3-1A1 · Principles

  2. What value of series resistor would be needed to obtain a full scale deflection on a 50 microamp DC meter with an applied voltage of 200 volts DC?

    • A.4 megohms.
    • B.2 megohms.
    • C.400 kilohms.
    • D.200 kilohms.
    Show answer

    A. 4 megohms.

    3-9B1 · Electrical Math

  3. What happens to the conductivity of photoconductive material when light shines on it?

    • A.It increases.
    • B.It decreases.
    • C.It stays the same.
    • D.It becomes temperature dependent.
    Show answer

    A. It increases.

    3-19C1 · Components

  4. What is the approximate magnitude of the impedance of a parallel R-L-C circuit at resonance?

    • A.Approximately equal to the circuit resistance.
    • B.Approximately equal to XL.
    • C.Low, as compared to the circuit resistance.
    • D.Approximately equal to XC.
    Show answer

    A. Approximately equal to the circuit resistance.

    3-29D1 · Circuits

  5. What is the voltage range considered to be valid logic low input in a TTL device operating at 5 volts?

    • A.2.0 to 5.5 volts.
    • B.-2.0 to -5.5 volts.
    • C.Zero to 0.8 volts.
    • D.5.2 to 34.8 volts.
    Show answer

    C. Zero to 0.8 volts.

    3-33E1 · Digital Logic

  6. What is the limiting condition for sensitivity in a communications receiver?

    • A.The noise floor of the receiver.
    • B.The power supply output ripple.
    • C.The two-tone intermodulation distortion.
    • D.The input impedance to the detector.
    Show answer

    A. The noise floor of the receiver.

    3-41F1 · Receivers

  7. What class of amplifier is distinguished by the presence of output throughout the entire signal cycle and the input never goes into the cutoff region?

    • A.Class A.
    • B.Class B.
    • C.Class C.
    • D.Class D.
    Show answer

    A. Class A.

    3-51G1 · Transmitters

  8. The deviation ratio is the:

    • A.Audio modulating frequency to the center carrier frequency.
    • B.Maximum carrier frequency deviation to the highest audio modulating frequency.
    • C.Carrier center frequency to the audio modulating frequency.
    • D.Highest audio modulating frequency to the average audio modulating frequency.
    Show answer

    B. Maximum carrier frequency deviation to the highest audio modulating frequency.

    3-57H1 · Modulation

  9. When a lead-acid storage battery is being charged, a harmful effect to humans is:

    • A.Internal plate sulfation may occur under constant charging.
    • B.Emission of oxygen.
    • C.Emission of chlorine gas.
    • D.Emission of hydrogen gas.
    Show answer

    D. Emission of hydrogen gas.

    3-60I1 · Power Sources

  10. Which of the following could cause a high standing wave ratio on a transmission line?

    • A.Excessive modulation.
    • B.An increase in output power.
    • C.A detuned antenna coupler.
    • D.Low power from the transmitter.
    Show answer

    C. A detuned antenna coupler.

    3-63J1 · Antennas
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