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CPL Test Series
Question Bank
Questions for GROUND RADAR
Answer the following questions
Test Mode
Training Mode
1. When carrying out a precision radar approach, talkdown normally ceases at _______ nm from touchdown
5 nm
3 nm
0.5 nm
2 nm
2. A ground based radar with a scanner rotation of 60rpm, a beam width in the order of .5° and a PRF of 10000pps would be
an Airfield Surface Movement Indicator with a theoretical range of 16nm.
a high resolution Surveillance Approach Radar.
an Airfield Surface Movement Indicator with a theoretical range of 8nm.
a Precision Approach Radar.
3. The frequency band and rate of scan of Airfield Surface Movement radars are
SHF; 60RPM
EHF; 10RPM
EHF; 100RPM
SHF; 200RPM
4. A primary radar has a pulse repetition frequency of 275 pps. The time interval between the leading edges of successive pulses is
36.4 microseconds.
3.64 microseconds.
3.64 milliseconds.
36.4 milliseconds.
5. A primary radar system has a pulse repetition frequency of 450 pps. Ignoring pulse width and flyback at the CRT, the maximum range of the radar would be
666 nm
180 nm
360 nm
333 nm
6. The SHF band has been selected for Airfield Surface Movement Indicator (ASMI) radars in preference to the EHF band because
the EHF band causes unacceptable radiation hazards to personnel.
the attenuation caused by precipitation is greater in the EHF band and reduces the radar’s effective range and usefulness.
target discrimination using the SHF band is better.
the EHF band is not suitable for the provision of the very narrow beams needed for an ASMI radar.
7. When flying a Precision Approach Radar in the UK, vertical displacement is based upon
QFE
QFF
Airfield QNH
Regional QNH
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