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WorksheetsIFR Navaids - NDB ADF
Total questions: 23
Worksheet time: 12mins
If night effect becomes apparent you may improve the accuracy by:
Decreasing altitude
Tuning to a station closer to the coast
Tuning to a closer station
Using the aural null method of obtaining a bearing
When the induced signals from the loop and sense antenna are combined in an ADF receiver, the resultant polar diagram is called
A Limacon
A Cardioid
A figure of eight
Circular
Coastal refraction on an ADF bearing will be increased if the:
Beacon is further inland
Beacon is nearer the coast
Aircraft is further away from the coast
Aircraft is nearer the coast
Which of the following factors could cause an error to an ADF bearing?
Which of the following factors could cause an error to an ADF bearing?
Tropospheric scatte
Scalloping
Night effect
An NDB radio wave is moving from land to sea. On crossing the coast the wave will bend ______ the coast. If flying at 90 degrees to the coast, the refraction will be at it's ________
Away, Maximum
Towards, Minimum
Towards, Maximum
Away, Minimum
An NDB transmits a signal pattern which is:
a 30hz poar diagram
Omni-directional
A bi-lobal pattern
A beam rotating at 30hz
NDB is a ____ transmitter within the assigned frequency band ____
MF/HF band and a frequency range of 190-1750 Khz
LF/MF band and a frequency range of 190-1750 Hz
MF/HF band and a frequency range of 190-1750 Hz
LF/MF band and a frequency range of 190-1750 Khz
When ADF equipment which incorporates a sense aerial and a loop aerial is tuned to an NDB and the loop is rotated so that a sharp null is found, the aerial is:
Upside down to the incoming signals
In line with the incoming signals
At right angles with the incoming signals
Aligned with the aircraft nose
In an ADF system, night effect is most pronounced:
During long winter nights
When the aircraft is at low altitude
When the aircraft is at high altitude
At dusk and dawn
Fading of an ADF signal,together with a hunting needle is an indication of:
Mountain Effect
Quadrantal error
Thunderstorm effect
Night effect
An adavantage of NDB's is:
Really accurate
No errors
Cheap and simple
No advantages
An NDB station radiates:
Identical horizontally polarized signals
Different vertically polarized signals
Identical vertically polarized signals
Different horizontally polarized signals
The range of the NDB can be:
Well over 400nm due to the low frequency used
200nm-400nm
30nm-200nm
30nm-400nm
Is day or night better for the use of NDB's?
Day
Night
Can ANT/REC/VOICE be used for Navigation?
Yes
No
What does an RBI give?
Gives magnetic track to the station
Gives relative bearing to the station
QDM & QDR stands for?
QDM - Relative bearing FROM
QDR - Relative bearing TO
QDM - Relative bearing TO
QDR - Relative bearing FROM
QDM -Magnetic bearing FROM
QDR - Magnetic bearing TO
QDM - Magnetic bearing TO
QDR - Magnetic bearing FROM
What will happen as you approach an NDB station?
Signal volume decreases and the needle is less sensitive
Signal volume decreases and the needle gets more sensitive
Signal volume increases and the needle sensitivity increases
Signal volume increases and the needle sensitivity decreases
Is mountain effect greater at low level or high level?
High level
Low level
The operating range of the NDB is dependent on:
Frequency of transmitter
Topography
Time of day
Efficiency of antenna
Type of surface
When ANT mde is selected the needle will:
Flick to 180 degrees relative
Not move
Flick to 90 degrees relative
Flick between 90 degrees and 270 degrees
Your heading is 130 degrees M. If your RBI is indicating 145, what is your QDM?
095 degrees
000 degrees
145 degrees
275 degrees
Your heading is 250 degrees magnetic. Your relative bearing to the station is 12 degrees. What is the QDM to the station?
250 degrees
262 degrees
238 degrees
