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