NZART Amateur Examination                     page 9          NZARTX07 Security code 261426

  1. A half wave antenna cut for 7 MHz can be used on this band without change:
    1. 10 metre
    2. 15 metre
    3. 20 metre
    4. 80 metre

  2. At the ends of a half-wave dipole the:
    1. voltage and current are both high
    2. voltage is high and current is low
    3. voltage and current are both low
    4. voltage low and current is high

  3. A 'skip zone' is:
    1. the distance between the antenna and where the refracted wave first returns to earth
    2. the distance between the far end of the ground wave and where the refracted wave first returns to earth
    3. the distance between any two refracted waves
    4. a zone caused by lost sky waves

  4. Signal fadeouts resulting from an 'ionospheric storm' or 'sudden ionospheric disturbance' are usually attributed to:
    1. heating of the ionised layers
    2. over-use of the signal path
    3. insufficient transmitted power
    4. solar flare activity

  5. The MUF for a given radio path is the:
    1. mean of the maximum and minimum usable frequencies
    2. maximum usable frequency
    3. minimum usable frequency
    4. mandatory usable frequency

  6. If the frequency of a transmitted signal is so high that we no longer receive a reflection from the ionosphere, the signal frequency is above the:
    1. speed of light
    2. sun spot frequency
    3. skip distance
    4. maximum usable frequency

  7. VHF or UHF signals transmitted towards a tall building are often received at a more distant point in another direction because:
    1. these waves are easily bent by the ionosphere
    2. these waves are easily reflected by objects in their path
    3. you can never tell in which direction a wave is travelling
    4. tall buildings have elevators
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