1-5 6-10 11-15 16-20 21-25
100
Federal Communications Commission (FCC).
Which US government agency divides the radio frequency spectrum into different bands?
100
Transceiver.
A combination transmitter and receiver, built as a single unit and shares common tuned circuits, is called a
100
when the frequencies are so high that their wavelength is miniscule.
A waveguide is a type of transmission line that you would use
100
no reflected waves.
A nonresonant transmission line is one with
100
soil and water in the propagation path.
The Earth’s conductivity is determined by the type of
200
SSB and ISB.
High-frequency (HF) transmissions are normally conducted in which two operating modes?
200
Copper.
Conductor material resistance in a transmission line leads to this type of loss.
200
their outer surface will arc from being very slightly damaged.
All statements concerning waveguides are true except
a. their outer surface will arc from being very slightly damaged. b. their conductive material construction is easily dented. c. their effectiveness is hindered by moisture. d. they can be destroyed by corrosion.
200
maximum power transfer results from a nonresonant line.
When discussing resonant and nonresonant transmission lines,
a. resonant lines are often referred to as flat lines.
b. maximum power transfer results from a resonant line.
c. maximum power transfer results from a nonresonant line.
d. significant loss and damage to equipment results from using a nonresonant line.
200
Refraction.
This term is used to describe radio waves that bend as they travel from one medium to another that has different density.
300
High frequency (HF).
Which frequency band is most susceptible to jamming?
300
Frequency.
The amount of skin-effect loss is directly proportional to the
300
Inductance and capacitance.
Which two transmission line properties determine its characteristic impedance (ZO)?
300
Signal loss would be significant.
This will likely result if a transmission line is terminated in an open.
300
atmospheric pressure, and temperature.
The refractive index of air depends on moisture,
400
sensitivity
The ability of a receiver to reproduce the signal of a very weak station is characteristic of a receiver’s
400
very high-resistance dielectric.
Leakage loss in a transmission line is minimized by using a
400
Wavelength is inversely related to frequency.
This is the correct statement concerning a wavelength.
a. Wavelength is inversely related to frequency.
b. Wavelength is directly related to frequency.
c. Wavelength is determined by the line length.
d. Wavelength is expressed in lambdas (λ).
400
Through the air in a straight line from transmitter to receiver.
Direct waves are radio waves that travel
400
Radio; 15.
When comparing the radio and optical horizons, which one is farther away and by what percentage?
500
fidelity.
The ability of a receiver to reproduce the input signal accurately is characteristic of its
500
rigid coaxial cable.
A transmission line that consists of a center conductor, placed inside a rigid metal tube that functions as the outer shield, is called
500
1.2 meters.
Determine the wavelength of a 250 megahertz (MHz) signal.
500
ground waves.
Radio waves that travel near the Earth’s surface are called
500
Diffraction.
Which process permits communication in shadow regions behind obstacles?






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