Vayudoot Aviation

1. The availability of 4096 codes in SSR is applicable to Mode?

S

C

A

All of the answers are correct.

2. SSR is not affected by weather clutter because?

The frequency used penetrates clouds.

The equipment uses a moving target indicator.

The wavelength is too short to be reflected from cloud droplets.

It uses different frequencies for transmission and reception.

3. In the SSR terminology "de-fruiting" means?

Removing all different colours from the display, making it a mono-colour display.

Displaying only aeroplanes changing altitude.

The removal from the display of random responses.

Displaying only aeroplanes with a selected destination.

4. In order to indicate an emergency situation, the aircraft Secondary Surveillance Radar (SSR) transponder should be set to

7000

7600

7700

7500

5. What is the maximum number of usable Secondary Surveillance Radar (SSR) transponder codes?

4096

760

1000

3600

6. What are the frequencies used for interrogation and response for SSR?

1030 MHz for interrogation from the ground, 1030 MHz for response from aircraft.

1090 MHz for interrogation from the ground, 1090 MHz for response from aircraft.

1090 MHz for interrogation from the ground, 1030 MHz for response from aircraft.

1030 MHz for interrogation from the ground, 1090 MHz for response from aircraft.

7. Which of the following statements regarding Mode S is most correct?

Mode S transponders reduce R/T traffic and also provide the aircraft with a datalink facility.

Mode S transponders are used with the radio altimeter.

Mode S and Mode A/C transponder use different frequencies in operation.

Mode S is used to assist GPS calculations.

8. SSR in ATC use?

Is complementary to primary radar.

Uses primary radar techniques.

Replaces primary radar.

Suffers from greater attenuation than primary radar, due to the higher frequencies used.

9. Selection of Mode C on the SSR provides ATC with information based on?

Aircraft pressure altitude.

Aircraft altitude as indicated on the captain's altimeter.

Aircraft height above QFE.

Aircraft height above the surface.

10. A TCAS II equipped aircraft will have mode S because?

The datalink is required to co-ordinate evasive manoeuvres.

True altitude is obtained from mode S.

A TCAS II equipped aircraft will have mode S because?

Mode S transmits a 3D position.

11. In order to indicate unlawful interference with the planned operation of the flight, the aircraft secondary Surveillance Radar (SSR) transponder should be selected to

7000

7500

7600

7700

12. When an aircraft is operating its secondary surveillance radar SSR in mode C an air traffic controller's presentation gives information regarding the aircraft's indicated flight level in increments of?

100 ft

150 ft.

200 ft.

250 ft.

13. On a typical computer generated SSR display the following data on a particular flight will be shown?

Squawk code, magnetic heading, ground speed, aeroplane callsign.

Destination, flight level, ground speed, aeroplane callsign.

Squawk code, flight level, ground speed, aeroplane callsign.

Squawk code, flight level, true heading, aeroplane callsign.

14. The SSR conspicuity code is ?

7000

2000

0033

760

15. In SSR, the interrogations use different modes. If altitude reporting is required, the aeroplane's transponder should be set to "ALT" and will respond to?

Mode A and C interrogations.

Mode C and Ident Interrogations.

Mode C interrogations only.

Mode A interrogations only.

16. In special conditions signals, to signify, to signify radio failure, which of the following codes should you select on your transponder?

7700

7500

7600

IDENT

17. Which of the following Secondary Surveillance Radar (SSR) codes is used to indicate transponder malfunction?

7600

4096

9999

18. A mode S transponder will?

Not respond to modes A or C because it is on a different frequency.

Not respond to interrogations on mode A.

Respond to mode A interrogations but not to mode C.

Respond normally to mode A or C interrogations.

19. In teh SSR response, the operation of the transponder ident button?

Sends out a special pulse in the X position in the pulse train.

Transmits the aeroplane's registration or flight number as a data sequence.

Sends out a special pulse before the normal pulse train.

Sends out a special pulse after the normal pulse train.

20. The vertical position provided by SSR Mode C is referenced to?

QNH

WGS 84 Datum.

1013.2 hPa.

QNH unless QFE is in use.

21. The ground Secondary Surveillance Radar (SSR) equipment incorporates a transmitter and receiver respectively operating in the following frequencies?

1090 MHz 1090 MHz.

1030 MHz 1090 MHz.

1090 MHz 1030 MHz.

1030 MHz 1030 MHz.

22. The spacing between two pulses transmitted by an SSR interrogator decides?

The identification of the SSR.

The ATC code to be sent to the aircraft.

What service may be provided by the SSR.

What mode is used.

23. The two main design functions of Secondary Surveillance Radar (SSR) Mode S are

Collision avoidance using TCAS II and improved long range (HF) communication capability.

Air to ground and ground to air data link communications and improved ATC aircraft surveillance capability.

Continuous automatic position reporting using Global Positioning system (GPS) satellites and collision avoidance using TCAS II

The elimination of ground to air communications and the introduction of automatic separation between aircraft using TCAS II

24. Which statement with respect to interrogation modes is correct?

Mode S Broadcast will transmit information to all mode S transponders.

Intermode A/C/S all call intermode A/C only all call, differ in the pulse spacing used between the P1 and P3 pulses.

Modes S only all-call will trigger transponder replies of all A/C/S transponders.

Mode S Selective will trigger replies of all mode S transponders. Mode A/C transponders are suppressed.

25. When a Mode C check is carried out, and assuming the equipment is working without error, the Mode C will report a pressure altitude of 35,064 feet as ?

FL3506.

FL351.

FL350.

FL35064.

26. Which one of the following switch position should be used when selecting a code on the Transponder?

STBY(Standby)

IDENT (Identification)

NORMAL

OFF

27. Garbling is caused by?

Aeroplanes in close proximity responding to the same interrogator.

An aeroplane's transponder responding to side lobes or reflections of the interrogation signal.

Aeroplanes at range responding to interrogations from another ATC SSR units.

Doppler effect on targets moving radially towards or away from the SSR.

28. Consider the following statements on SSR Mode S?

A mode S interrogator, when installed, will also collect data from old Mode A and C transponders.

All of the statements are correct.

Mode S will be able to address any particular one of some 16 million aircraft.

Mode S will have the ability to transmit short messages from the ground to a particular aircraft.

29. The SSR transceiver interrogates on ..... and receives on ....?

1090 MHz 1090 MHz.

1090 MHz 1030 MHz.

1030 MHz 1030 MHz.

1030 MHz 1090 MHz.

30. With regard to SSR?

The interrogator is in the aircraft and the transponder is on the ground.

The interrogator is on the ground and the transponder is in the aircraft.

The interrogator is on the ground and the transponder is on the ground.

The interrogator is in the aircraft and the transponder is in the aircraft.

31. Data transmission and exchange is conducted on?

Mode A.

Mode D.

Mode C.

Mode S.

32. The accuracy of SSR height as displayed to the air traffic controller is

+/- 75 feet.

+/- 100 feet.

+/- 50 feet.

+/- 25 feet.

33. In order to indicate radio failure the aircraft SSR transponder should be selected to code

7600

7500

7700

7000

34. Why is a secondary radar display screen free of storm clutter?

The principle of 'echo' return is not used in secondary radar.

A moving target indicator facility suppresses the display of static or near static returns.

The frequencies employed are too high to give returns from moisture sources.

The frequencies employed are too low to give returns from moisture sources.

35. What SSR modes are frequently used by ATC

Mode A, mode B and mode C.

Mode A and mode C.

Mode A and mode B.

Mode C and mode D.

36. Which statement regarding Mode S transponders is most correct?

Mode S transponders are used with TCAS II.

Mode S and mode C transponders operate on different frequencies.

Mode S transponders are used to assist GPS positioning.

Mode S transponders reduce R/t traffic and provide a datalink facility.

37. What informattion may be displayed on an ATC radar screen connected only to a primary radar system?

Aircraft altitude.

Aircraft positions only.

Aircraft positions and SSR code.

Aircraft position, SSR code and altitude.

38. The ATC transponder system, excluding mode S, contains

Two modes, each of 4096 codes.

Four modes, each 1024 codes.

Two modes, each 1024 codes.

Four modes, each 4096 codes.

39. "Fruiting" is caused by?

Aeroplanes in code proximity responding to the same interrogator.

Doppler effect on targets moving radially towards or away from the SSR.

Aeroplanes at range responding to interrogations from another ATC SSR units.

An aeroplane's transponder responding to side lobes or reflection of the interrogation signal.

40. Which one of the following Secondary Surveillance Radar (SSR) codes should be used by aircraft entering airspace from an area where SSR operation has not been required?

5000

2000

7000

41. When aircraft is operating its Secondary Surveillance Radar in mode C an air traffic controller's presentation gives information regarding the aircraft's indicated flight level that is accurate to within

+ or - 25 FT.

+ or - 50 FT

+ or - 100 FT.

+ or - 75 FT.

42. Why do clouds not appear on the secondary radar screens

Too low a frequency.

Too high a frequency.

They do not provide an echo by returning signals.

The transmit and receive signals are on different frequencies.

43. A secondary radar can provide up to 4096 different codes. These 4096 codes can be used in?

Mode A only.

Mode C only.

Mode S.

All modes.

44. When both SSR and primary radar is presented on the controller's display?

The SSR information is more accurate in bearing and distance.

Altitude information is presented for all targets.

The primary radar information is more accurate in bearing and distance.

The primary radar information is superfluous.

45. The frequency of an SSR ground transmission is

1050 +/- 0.5 Mhz.

1090 +/- 0.3 Mhz.

1120 +/- 0.6 Mhz.

1030 +/- 0.2 Mhz.

46. If an aircraft is hijacked it is recommended that the pilot sets transponder code?

7500

0000

7700

7600

47. When the ATC transponder "IDENT" button is pressed by the pilot?

The aeroplane's identification will be sent to all SSR within range.

The aeroplane's echo on the controller's display will flash or "fill in".

The controller will be urged to identify the aeroplane.

Mode A will automatically be selected.

48. With normal SSR Mode A coding the aircraft replies by sending back a train of 12 pulses contained between 2 framing pulses with?

Up to 4096 codes in 4 boxes.

Up to 4096 codes in 8 boxes.

Up to 2048 codes in 4 boxes.

Up to 4096 codes in 12 boxes.

49. Most aeroplanes are fitted with a transponder which is an essential aspect of .......... Radar?

Secondary surveillance

Primary

Precision approach

Security surveillance

50. The transponder code set in an SSR system consist of?

4 digits, forming any of 7777 different codes.

4 digits, forming any of 9999 different codes.

2 digits and 2 letters, forming any 4096 different codes.

4 digits, forming any of 4096 different codes.

Question Bank

Questions for SSR