Vayudoot Aviation

1. Secondary radars require

quiescent target.

a target which will respond to the interrogation, and this target may be either an aircraft or a ground based transponder.

a target which will respond to the interrogation, and this target will always be an aircraft.

a target which will respond to the interrogation, and this target will always be ground based.

2. Secondary Surveillance Radar is a form of ________ radar with type emissions operating in the _________ band

primary pulse SHF

secondary pulse UHF

secondary FM SHF

primary pulse UHF

3. The special SSR codes are as follows: emergency ______, radio failure _______, entering UK airspace _______, unlawful interference with the conduct of the flight ________

7700; 7600; 7500; 2000.

7600; 7500; 2000; 7700.

7500; 7600; 2000; 7700.

7700; 7600; 2000; 7500.

4. When using SSR the ground controller will ask the pilot to cancel mode C if there is a discrepancy of more than ______ feet between the altitude detected by the radar from the reply pulses and the altitude reported by the pilot read from an altitude with the subscale set to _______

100 ft Regional QNH

50 ft 1013 HPa

300 ft 1013 HPa

300 ft Regional QNH

5. If the SSR transponder IDENT button is pressed

it causes a momentary distinctive display to appear on the controller's screen.

an identification pulse is automatically and continuously transmitted for 20 seconds, 4.35µ sec before the last framing pulse.

an identification pulse is automatically and continuously transmitted for 10 seconds, 4.35µ sec after the last framing pulse.

an identification pulse is automatically and continuously transmitted for 20 seconds, 4.35µ sec after the last framing pulse

6. The SSR code which is appropriate for a UK FIR (inbound. crossing, where no other “squawk” has been allocated is

2000

7700

7500

7600

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