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CPL Test Series
Question Bank
Questions for GROUND RADAR
Answer the following questions
Test Mode
Training Mode
1. During a surveillance radar approach, the vertical position of the aeroplane, unless advised otherwise, is given in terms of?
Height above QNH threshold.
Height above aerodrome level.
Height above aerodrome QNH level.
Height above QNH datum.
2. Why does surface movement radar use a frequency in the SHF band and not EHF?
SHF gives better definition of aircraft type than EHF.
The power requireents of EHF were unsustainable in Europe.
EHF is potentially hazardous to personnel in the area. This was completely overcome by switching to SHF.
EHF is absorbed and scattered by moisture in the air. Switching so SHF band because?
3. An area surveillance radar is most likely to have a frequency of?
600 MHz.
350 MHz.
150 Hz.
100 Hz.
4. A radar used by ATC has the following characteristics. Long wavelength and aerial rotation rate of 5 RPM. It is most likely to be?
Terminal surveillance radar.
Airfield surface movement radar.
Precision approach radar.
Enroute surveillance radar.
5. Complete the following statement, Aircraft surface Movement Radar operates on frequencies in the _________ (i) band employing an antenna that rotates at approximately ____________ (ii) revolutions per minute; it is _________ (ii) possible to determine the type of aircraft from the returns on the radar screen
(i) EHF, (ii) 30, (iii) never.
(i) SHF, (ii) 10, (iii)) always.
(i) EHF, (ii) 100, (iii)) never.
(i) SHF, (ii) 60, (iii)) sometimes.
6. On which of the following radar displays is it possible to get an indication of the shape and to some extent type, of the aircraft generating the returns?
Airborne Weather Radar (AWR).
Aerodrome Surface Movement Radar (ASMR).
Aerodrome Surveillance Approach Radar.
Secondary Surveillance Radar (SSR).
7. If a radar has a beam width of 3 degrees and a pulse length of 4 microsecond, the target azimuth resolution at a range of 60 nm will be approximately?
4 nm.
1 nm.
3 nm.
2 nm.
8. A surveillance radar installation will often consist of?
A primary radar and a VDF.
A primary radar and a precision radar.
An SSR and a precision radar.
A primary radar and a secondary surveillance radar (SSR).
9. In which frequency band do most Airfield Surface Movement radar systems operate?
SHF.
VHF.
UHF.
EHF.
10. A surveillance radar element (SRE) used to provide approach guidance?
May not be used in heavy rain because of the high levels of signal loss.
Can only be used to a point 3 miles from the threshould.
Does not have a height determination capacity.
Can be used to given guidance both horizontally and vertically.
11. An SRA may be flown to?
2 nm using QFE unless the pilot advises the controller that the approach is to be flown on QNH.
0.5 m using QFE unless the pilot advises the controller that the approach is to be flown on QNH.
2 nm using QNH only.
0.5 nm using QNH only.
12. Two types of radar approach may be available?
Final approach and precision approach.
Terminal approach and surveillance approach.
Surveillance approach and precision approach.
Surveillance approach and final approach.
13. Which is the typical range of a Terminal area Surveillance Radar (TAR)?
Up to 2500 nm.
Up to 25 nm.
Up to 250 nm.
Up to 80 nm.
14. Precision Approach radars (PAR) are required under the ICAO specification to indicate an aircraft within the following parametres?
Azimuth 20 degrees, vertical 7 degrees range 9 nm.
Azimuth 10 degrees, vertical 4 degrees range 7 nm.
Azimuth 30 degrees, vertical 10 degrees range 10 nm.
Azimuth 40 degrees, vertical 15 degrees range 15 nm.
15. Short range aerodrome radars will have _____ wavelengths?
Millimetric
Decimetric
Metric
Centimetric
16. In order to be able to penetrate cloud, a primary radar signal must have?
A long wavelength.
A high PRF.
A high frequency.
A short wavelength.
17. A long range ATC surveillance radar will typically use a frequency of?
600 MHz.
1000 MHz.
3000 MHz.
10 Ghz.
18. PAR at a military airfield has both an azimuth and an elevation element. It must be able to provide accuracy within?
+/-20 feet elevation and +/-30 feet azimuth.
+/-30 feet elevation and azimuth.
+/-30 feet elevation and +/-20 feet azimuth.
+/-20 feet elevation and azimuth.
19. The maximum range obtainable from an ACT en-route surveillance radar is approximately?
300 to 400 nm.
50 to 100 nm.
200 to 300 nm.
100 to 200 nm.
20. Surface movement radars operate mainly in the SHF band as opposed to the EHF band because?
EHF is more expensive.
The EHF band not provide sufficient frequency spacing.
EHF is likely to detect more moisture in the atmosphere.
EHF radiated power is more dangerous to users health.
21. What is a typical range for an Enroute Surveillance Radar (RSR)?
Up to 25 nm.
Up to 80 nm.
Up to 250 nm.
Up to 2500 nm.
22. The maximum range of ground radar is limited by?
Average power.
Peak power.
Pulse width.
Pulse recurrence rate.
23. A moving target indicator (MTI)?
Rejects all moving targets.
Rejects all stationary targets.
Is not effective if the target moves directly towards the ground unit.
Is only effective if the target moves directly towards the ground unit.
24. An Aerodrome Ground Movements Radar is likely to operate in the __________ band with a scan rate of ________ revolutions per minute.
SHF 60.
UHF 20.
EHF 1000.
EHF 20.
25. A ground radar transmitting at a PRF of 1200 pulses per second will have a maximum unambiguous range of approximately?
135 nm.
270 nm.
27 nm.
67 nm.
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