NZART Amateur Examination                     page 9          NZARTX07 Security code 249733

  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. On VHF and UHF bands, polarisation of the receiving antenna is important in relation to the transmitting antenna, but on HF it is relatively unimportant because:
    1. the ionosphere can change the polarisation of the signal from moment to moment
    2. the ground wave and the sky wave continually shift the polarisation
    3. anomalies in the earth's magnetic field profoundly affect HF polarisation
    4. improved selectivity in HF receivers makes changes in polarisation redundant

  3. The highest frequency that will be reflected back to the earth at any given time is known as the:
    1. UHF
    2. MUF
    3. OWF
    4. LUF

  4. The layer of the ionosphere mainly responsible for long distance communication is:
    1. C
    2. D
    3. E
    4. F

  5. The 80 metre band is useful for working:
    1. in the summer at midday during high sunspot activity
    2. long distance during daylight hours when absorption is not significant
    3. all points on the earth's surface
    4. up to several thousand kilometres in darkness but atmospheric and man-made noises tend to be high

  6. The distance travelled by ground waves in air:
    1. is the same for all frequencies
    2. is less at higher frequencies
    3. is more at higher frequencies
    4. depends on the 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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