Magnetic and electric fields about a radiating conductor are:
  1. parallel to each other 2. determined by the type of antenna used 3. perpendicular to each other 4. none of the above

 The velocity of propogation of radio frequency energy in free space is:
1. 186,000 kilometers per second 2. 300,000 metres per second 3. 186,000 metres per second 4. 300,000 kilometers per second

Polarization is determined by the:
1. magnetic field 2. electric field 3. position of the antenna 4. type of antenna

The radio wave which follows a path from the transmitter
to the ionosphere and back to earth is known correctly as:
1. sky wave 2. skip wave 3. surface wave 4. F layer

That portion of the radiation kept close to the earth's
surface due to bending in the atmosphere is called the:
1. ionospheric wave 2. tropospheric wave 3. ground wave 4. inverted wave

That portion of the radiation which is directly affected by the surface of the earth is called:
1. ionospheric wave 2. tropospheric wave 3. ground wave 4. inverted wave

The medium which reflects high frequency waves back to the earth's surface is called the:
1. biosphere 2. stratosphere 3. ionosphere 4. troposphere

There are three recognized layers in the ionosphere that affect radio propogation.
They are called:
1. a, e, f 2. b, d, e 3. c, e, f 4. d, e, f

For long distance propogation, the radiation angle from the antenna should be:
1. less than 30 degrees 2. more than 30 degrees but less than 45 3. more than 45 degrees but less than 90 4. 90 degrees

One of the following statements in regards to 80 metres is true:
1. during daylight hours adsorption is not significant 2. atmospheric and man made noises tend to be high 3. during the winter months, the band is only good for short distances (200 miles) 4. it is a very good band for DX in the summer during periods of high sunspot activity

What is the only medium frequency band available for amateur operation:
  1. 160 metres 2. 80 metres 3. 40 metres 4. 20 metres

  Communication on the 80 metre band is generally most difficult during:
1. evening in summer 2. evening in winter 3. daytime in summer 4. daytime in winter

28 Mhz radio signals are more likely to be heard over great distances:
1. if the transmitter power is reduced 2. during daylight hours 3. only during the night 4. at full moon

Solar cyles have an average length of:
1. 1 year 2. 3 years 3. 6 years 4. 11 years

The "Critical frequency" is defined as:
1. highest frequency to which your transmitter can be tuned 2. lowest frequency which is reflected back to earth 3. minimum usable frequency 4. highest frequency which will be reflected back to earth

Two or more parts of the radio wave may follow different paths during propogation and this may result in phase differences at the receiver. This "change" at the receiver is called:
1. adsorption 2. baffling 3. fading 4. skip

The usual effect of ionospheric storms is to:
1. increase the maximum usable frequency 2. cause fade-out of skywave signals 3. produce extreme weather changes 4. prevent communications by ground wave

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

The skip distance of a sky wave will be greatest when the:
1. ionosphere is most densly ionized 2. signal given out is strongest 3. angle between ground and radiation is smallest 4. polarization is vertical

Wave energy produced on frequencies below 4 Mhz during
daylight hours is almost completely absorbed by the ................ layer:
1. C 2. D 3. E 4. F