NZART Amateur Examination                     page 4          NZARTX07 Security code 261426

  1. A "high Q" resonant circuit is one which:
    1. carries a high quiescent current
    2. is highly selective
    3. has a wide bandwidth
    4. uses a high value inductance

  2. A residual current device is recommended for protection in a mains power circuit because it:
    1. reduces electrical interference from the circuit
    2. removes power to the circuit when the phase and neutral currents are not equal
    3. removes power to the circuit when the current in the phase wire equals the current in the earth wire
    4. limits the power provided to the circuit

  3. The following material is considered to be a semiconductor:
    1. copper
    2. sulphur
    3. silicon
    4. tantalum

  4. A semiconductor is described as a "general purpose audio NPN device". This is a:
    1. triode
    2. silicon diode
    3. bipolar transistor
    4. field effect transistor

  5. In the figure shown, 2 represents the:
    1. base of a pnp transistor
    2. drain of a junction FET
    3. gate of a junction FET
    4. emitter of a pnp transistor

  6. The correct instrument for measuring the supply current to an amplifier is a:
    1. wattmeter
    2. voltmeter
    3. ammeter
    4. ohmmeter

  7. An amplifier with a gain of 20 dB has a -10 dB attenuator connected in cascade. The gain of the combination is:
    1. 8 dB
    2. 10 dB
    3. -10 dB
    4. -200 dB
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