MTN COMM UPDATED ACTUAL Exam
Questions and CORRECT Answers
Omni-directional - CORRECT ANSWER - Radiates and receives radio waves in ALL
directions.
Uni-directional - CORRECT ANSWER - Radiates and receives radio waves in ONLY
ONE direction.
Bi-directional - CORRECT ANSWER - Radiates and receives radio waves in TWO
directions.
Diffraction - CORRECT ANSWER - The process by which electromagnetic waves are
bent so that they appear behind an obstruction.
Directivity - CORRECT ANSWER - The property of radiating more energy in some
directions than in others.
Gain - CORRECT ANSWER - The increase in signal strength that is produced by an
amplifier.
Impedance - CORRECT ANSWER - The measure of how difficult it is for current to flow
through a conductor.
Noise - CORRECT ANSWER - Random pulses of electromagnetic energy generated by
lightning or electrical equipment.
Reflection - CORRECT ANSWER - The turning back of a radio wave from an object or
the surface of the earth.
, Refraction - CORRECT ANSWER - The bending, or changing direction, of a radio wave
passing into or through layers of the atmosphere or the ionosphere that have different density
(dielectric constant).
Resistance - CORRECT ANSWER - The property of material or substance to oppose the
passage of current through it, thus causing electrical energy to be converted into heat energy.
Resonance - CORRECT ANSWER - The state or frequency of vibration, electrical or
mechanical, in which forces that impede the motion are minimum.
Skip zone - CORRECT ANSWER - Is the area that starts when the ground wave ends and
continues until the sky wave hits the earths surface.
Take off angle - CORRECT ANSWER - The angle measured from the earths surface or
horizontal up to the direction of propagation towards the ionosphere.
NVIS - CORRECT ANSWER - Near Vertical Incidence Sky wave allows for decreased
skip zones and is extremely beneficial when operating in complex compartmentalized terrain.
NVIS in theory allows for successful communications in distances ranging from 10-300 miles.
Critical Angle wave - CORRECT ANSWER - Is the steepest angle that a radio wave hits
the ionosphere and is reflected back to the earths surface vice punching through the ionosphere
and continuing into space.
ALE - CORRECT ANSWER - Automatic Link Establishment is the process of making a
point to point radio connection. I'm ALE mode the radio scans for the best link ( frequency) to be
utilized.
LQA - CORRECT ANSWER - Link Quality Analysis is a test to measure the signal
strength between radios. This is an ALE function. Optimal range is 70-100.
Questions and CORRECT Answers
Omni-directional - CORRECT ANSWER - Radiates and receives radio waves in ALL
directions.
Uni-directional - CORRECT ANSWER - Radiates and receives radio waves in ONLY
ONE direction.
Bi-directional - CORRECT ANSWER - Radiates and receives radio waves in TWO
directions.
Diffraction - CORRECT ANSWER - The process by which electromagnetic waves are
bent so that they appear behind an obstruction.
Directivity - CORRECT ANSWER - The property of radiating more energy in some
directions than in others.
Gain - CORRECT ANSWER - The increase in signal strength that is produced by an
amplifier.
Impedance - CORRECT ANSWER - The measure of how difficult it is for current to flow
through a conductor.
Noise - CORRECT ANSWER - Random pulses of electromagnetic energy generated by
lightning or electrical equipment.
Reflection - CORRECT ANSWER - The turning back of a radio wave from an object or
the surface of the earth.
, Refraction - CORRECT ANSWER - The bending, or changing direction, of a radio wave
passing into or through layers of the atmosphere or the ionosphere that have different density
(dielectric constant).
Resistance - CORRECT ANSWER - The property of material or substance to oppose the
passage of current through it, thus causing electrical energy to be converted into heat energy.
Resonance - CORRECT ANSWER - The state or frequency of vibration, electrical or
mechanical, in which forces that impede the motion are minimum.
Skip zone - CORRECT ANSWER - Is the area that starts when the ground wave ends and
continues until the sky wave hits the earths surface.
Take off angle - CORRECT ANSWER - The angle measured from the earths surface or
horizontal up to the direction of propagation towards the ionosphere.
NVIS - CORRECT ANSWER - Near Vertical Incidence Sky wave allows for decreased
skip zones and is extremely beneficial when operating in complex compartmentalized terrain.
NVIS in theory allows for successful communications in distances ranging from 10-300 miles.
Critical Angle wave - CORRECT ANSWER - Is the steepest angle that a radio wave hits
the ionosphere and is reflected back to the earths surface vice punching through the ionosphere
and continuing into space.
ALE - CORRECT ANSWER - Automatic Link Establishment is the process of making a
point to point radio connection. I'm ALE mode the radio scans for the best link ( frequency) to be
utilized.
LQA - CORRECT ANSWER - Link Quality Analysis is a test to measure the signal
strength between radios. This is an ALE function. Optimal range is 70-100.
