CAA NZ IFR NAV AIDS EXAM
QUESTIONS & ANSWERS12
How much roll and pitch does a Flux value give - ANSWERS -This unit has freedom in roll and
pitch up to about 30º. Beyond this the synchronisation is stopped by the pitch and roll sensing
cut out switches. It has no freedom in yaw relative to the aircraft. It is mounted in a seal
container which is partially filled with liquid to dampen out oscillation.
What is the Flux values Limitations - ANSWERS -The synchronisation rate is 2º per minute at the
most
Pivot freedom is limited to 30º Pitch and roll.
Turning error. As the Aircraft turns the flux valve tends to sense some of the vertical component
of the earth's magnetic field (not serious due the slow
What is the RMI - ANSWERS -The RIM is essentially a RIC with two navigation aids connect to
the instrument the index provides magnetic heading information. Each needle provides a QDM
to the station which they are tuned.
What stations does a RMI - ANSWERS -
What speed does a electro-magnetic wave travel at - ANSWERS -Speed of light , 162,000
nautical miles per second
Define a Cycle - ANSWERS -The positive and negative parts of an alternating current
Define what is a Frequency - ANSWERS -The number of cycles per second (Known as Hertz)
, What is the Frequency forumla - ANSWERS -Frequency = Speed of radio waves / Wave length
Define a Wavelength - ANSWERS -the physical distance between 2 identical part of cycle
Define amplitude - ANSWERS -The maximum vertical displace of the alternating current. Positive
and negitive
Define Phase - ANSWERS -This is particular stage of a cycle of an alternating current.
Define phase difference - ANSWERS -the angular difference between the corresponding point of
the wave.
Define Polarisation - ANSWERS -Electromagnetic wave radiating from an antenna has a vertical
and a horizontal component. Polarisation refers to the direction of the electric field radiating
from an antenna with respect to the earth
Define attenuation - ANSWERS -As signal travels, strength diminishes, this strength reduction is
called attenuation and it responses to square law. ( Three times the distance gives nine times
the attenuation) High Frequency gives a faster rate of attenuation.
Define modulation - ANSWERS -Process of adding/impressing intelligence onto a carrier wave
Define Carrier Wave - ANSWERS -Electromagnetic wave radiated by the transmitter at its
selected frequency
Define amplitude Modulation - ANSWERS -Frequency of carrier is constant and its amplitude is
varied by the wave form of the intelligence being added to it.
QUESTIONS & ANSWERS12
How much roll and pitch does a Flux value give - ANSWERS -This unit has freedom in roll and
pitch up to about 30º. Beyond this the synchronisation is stopped by the pitch and roll sensing
cut out switches. It has no freedom in yaw relative to the aircraft. It is mounted in a seal
container which is partially filled with liquid to dampen out oscillation.
What is the Flux values Limitations - ANSWERS -The synchronisation rate is 2º per minute at the
most
Pivot freedom is limited to 30º Pitch and roll.
Turning error. As the Aircraft turns the flux valve tends to sense some of the vertical component
of the earth's magnetic field (not serious due the slow
What is the RMI - ANSWERS -The RIM is essentially a RIC with two navigation aids connect to
the instrument the index provides magnetic heading information. Each needle provides a QDM
to the station which they are tuned.
What stations does a RMI - ANSWERS -
What speed does a electro-magnetic wave travel at - ANSWERS -Speed of light , 162,000
nautical miles per second
Define a Cycle - ANSWERS -The positive and negative parts of an alternating current
Define what is a Frequency - ANSWERS -The number of cycles per second (Known as Hertz)
, What is the Frequency forumla - ANSWERS -Frequency = Speed of radio waves / Wave length
Define a Wavelength - ANSWERS -the physical distance between 2 identical part of cycle
Define amplitude - ANSWERS -The maximum vertical displace of the alternating current. Positive
and negitive
Define Phase - ANSWERS -This is particular stage of a cycle of an alternating current.
Define phase difference - ANSWERS -the angular difference between the corresponding point of
the wave.
Define Polarisation - ANSWERS -Electromagnetic wave radiating from an antenna has a vertical
and a horizontal component. Polarisation refers to the direction of the electric field radiating
from an antenna with respect to the earth
Define attenuation - ANSWERS -As signal travels, strength diminishes, this strength reduction is
called attenuation and it responses to square law. ( Three times the distance gives nine times
the attenuation) High Frequency gives a faster rate of attenuation.
Define modulation - ANSWERS -Process of adding/impressing intelligence onto a carrier wave
Define Carrier Wave - ANSWERS -Electromagnetic wave radiated by the transmitter at its
selected frequency
Define amplitude Modulation - ANSWERS -Frequency of carrier is constant and its amplitude is
varied by the wave form of the intelligence being added to it.
