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Question 219-1 : The three main components of vor airborne equipment are ? [ Preparation civilian ]

Receiver antenna display

Question 219-2 : The pictures at reference are showing an aircraft's position with respect to some thunderstorm cells and the image the pilot is getting from the radar to detect this blind alley the pilot should 2071 ?

Increase the range setting of his radar.

Increase the range setting of his radar will permit to the pilot to see whether there is continued clear weather further
exemple 323: Increase the range setting of his radar
Switch over from normal to wx-mode. initiate a steep climb. select the cosecant square beam for better alley detection.

Question 219-3 : The 'gain' control knob of an awr airborne weather radar adjusts ?

The receiver sensitivity in order to achieve optimum target acquisition.

exemple 327: The receiver sensitivity in order to achieve optimum target acquisition
The brightness of the display. the automatic gain control of the awr is activated. the power level of the transmitted energy is made dependent on the selected range.

Question 219-4 : Which statement is correct with respect to selections on the transponder control panel ?

With alt selected a reply in the modes a c and s can be transmitted.

Turn your transponder to the alt position it enables it to respond to mode a mode c and mode s interrogations even if you don't have an altitude encoder installed you should operate your transponder in the alt mode the reason for this is that the ground station is still looking for framing pulses from your transponder even if there's no altitude information accompanying them
exemple 331: With alt selected a reply in the modes a c and s can be transmitted
The correct icao 24 bits aircraft address code must be inserted on the control panel. with on selected a reply in the modes a,c and s can be transmitted. with the selector knobs the four digits of the squawk can be selected using the decimal symbols 0 through 9.

Question 219-5 : Echoes that do not change in distance from the antenna relative speed zero of a ground radar with a moving target indicator mti are dangerous for the following reason ?

The moving target indicator mti eliminates such echoes.

Moving target indicator mti makes use of doppler to eliminate returns from fixed objects such as hills or buildings the radar will only display returns that show a doppler shift ie moving targets but a target maintaining a constant range would not show up
exemple 335: The moving target indicator mti eliminates such echoes
The radar is not able to display two echoes moving in the same direction. the mti does not recognise this as a moving object due to the blind speed. the frequency of the transmitted radar signals changes too much by the doppler effect.

Question 219-6 : Mode sthe allocation of 24 bit aircraft addresses is described in the icao annex 10 it states that ?

Every aircraft will have been allocated with an icao aircraft address which is hard coded into the airframe.

Icao annex 10 volume 3 communications systems chapter 5 ssr mode s air ground data linkaircraft address a unique combination of 24 bits available for assignment to an aircraft for the purpose of air ground communications navigation and surveillancechapter 9 aircraft addressing system91 the aircraft address shall be one of 16 777 214 twenty four bit aircraft addresses allocated by icao to the state of registry or common mark registering authority and assigned as prescribed in the appendix to this chapterappendix to chapter 9 a worldwide scheme for the allocation assignment and application of aircraft addresses1 general11 global communications navigation and surveillance systems shall use an individual aircraft address composed of 24 bits at any one time no address shall be assigned to more than one aircraft the assignment of aircraft addresses requires a comprehensive scheme providing for a balanced and expandable distribution of aircraft addresses applicable worldwide
exemple 339: Every aircraft will have been allocated with an icao aircraft address which is hard coded into the airframe
Military aircraft will have been allocated with an icao aircraft address which is hard coded into the transponder. civil aircraft will have been allocated with an icao aircraft address which is hard coded into the airframe. every aircraft will have been allocated with a nato aircraft address which is hard coded into the airframe.

Question 219-7 : Mode show does a ground interrogation signal mode a and c is transmitted to a transponder ?

In the form of pairs of interrogative pulses with an additional control pulse.

exemple 343: In the form of pairs of interrogative pulses with an additional control pulse
In the form of pairs of pulses. by using the long p4 pulse. in the form of a series of pulses and a special position identification (spi) pulse.

Question 219-8 : The magnetic heading of an aircraft is 040° on the airborne weather radar display the relative bearing of and the distance to the most southerly part of lands end approximate position 50°03'n 005°40'w are 030°r and 80 nmwhat is the position of the aircraft based on these observations 2068 ?

49°25'n 007°30'w.

Relative bearing = 040° + 030° = 070°applied the variation 6°west on the chart so 070° 6° = 064°064° + 180 ° = aircraft is on a bearing of 244° true from the stationnow plot a position line 80 nm from the position 50°03'n 005°40'wyou are at position 49°25'n 007°30'w 1695
exemple 347: 49°25'n 007°30'w
(48°50'n , 006°22'w) (49°35'n , 007°36'w) (49°45'n , 007°42'w)

Question 219-9 : The airborne weather radar ?

May receive no reflections from a thunderstorm in an area behind a heavy rain shower.

The danger of the area behind heavy rain shadow area exists because no radar waves can penetrate deeply enough inside
exemple 351: May receive no reflections from a thunderstorm in an area behind a heavy rain shower
Has a second transmitter working on a lower frequency in order to penetrate rain shower. has the possibility to detect clear air turbulence. deviates downward, whatever the attitude of the aircraft is.

Question 219-10 : The spacing between the two pulses transmitted by an ssr interrogator determines ?

What mode is used.

exemple 355: What mode is used
The identification of the ssr. what service may be provided by the ssr. the atc code to be set in the aircraft.

Question 219-11 : When the atc transponder 'ident' button is pressed by the pilot ?

The airplane's symbol on the controller's display will flash or 'fill in'.

exemple 359: The airplane's symbol on the controller's display will flash or 'fill in'
The airplane's identification will be sent to all ssrs within range. mode a will automatically be selected. the controller will be urged to identify the airplane.

Question 219-12 : On a typical computer generated ssr display the following data on a particular flight will be shown ?

Squawk code flight level ground speed airplane callsign.

exemple 363: Squawk code flight level ground speed airplane callsign
Squawk code, flight level, true heading, airplane callsign. squawk code, magnetic heading, ground speed, airplane callsign. destination, flight level, ground speed, airplane callsign.

Question 219-13 : In the ssr response the operation of the transponder ident button ?

Sends a special pulse after the normal response pulse train.

exemple 367: Sends a special pulse after the normal response pulse train
Transmits the aeroplanes registration or flight number as a data coded sequence. sends a special pulse in the x position on the pulse train. sends a special pulse before the normal response pulse train.

Question 219-14 : Which one of the following switch positions should be used when selecting a code on the transponder ?

Stby standby .

exemple 371: Stby standby
Off. normal. ident (identification).

Question 219-15 : In the ssr terminology 'de fruiting' means ?

The removal from the display of random responses.

exemple 375: The removal from the display of random responses
Removing all different colors from the display, making it a mono-color display. displaying only airplanes with a selected destination. displaying only airplanes changing their altitude.

Question 219-16 : The selection of code 2000 on an aircraft ssr transponder indicates ?

Entry into airspace from an area where ssr operation has not been required.

exemple 379: Entry into airspace from an area where ssr operation has not been required
An emergency. unlawful interference with the planned operation of the flight. transponder malfunction.

Question 219-17 : With ssr interrogation and response signals ?

Are standard frequencies separated by 60 mhz.

Ssr is fixed on 1030 mhz and 1090 mhz
exemple 383: Are standard frequencies separated by 60 mhz
Are separated by 63 mhz. must be set by the pilot but are always 60 mhz apart. are at variable frequencies set by the controller but are always 63 mhz apart.

Question 219-18 : Using ssr the normal transmission from the atc transponder in the aircraft consists of ?

The two pulses received plus an additional number of pulses between them.

exemple 387: The two pulses received plus an additional number of pulses between them
The two pulses received plus the aircraft identification. the aircraft identification plus pulses giving the altitude. pulses giving the altitude, plus any ident pulse.

Question 219-19 : With regard to ssr ?

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

exemple 391: The interrogator is on the ground and transponder is in the aircraft
The interrogator is on the ground and transponder is on the ground. the interrogator is on the aircraft and transponder is in the aircraft. the interrogator is on the aircraft and transponder is on the ground.

Question 219-20 : 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 35064 ft as ?

Fl351.

The altitude information sent with a transponder mode c is in hundreds of feet with an accuracy to + or 50 ft35064 ft will be encoded as 351 35100 ft 35064 ft is round to the nearest hundred
exemple 395: Fl351
Fl350. 3506. 35064.

Question 219-21 : 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 c and a interrogations.

exemple 399: Mode c and a interrogations
Mode a interrogations only. mode c interrogations only. mode c and ident interrogations.

Question 219-22 : The atc transponder system excluding mode s contains ?

Two modes each 4096 of codes.

exemple 403: Two modes each 4096 of codes
Four modes, each of 1024 codes. four modes, each of 4096 codes. two modes, each of 1024 codes.

Question 219-23 : A mode s transponder ?

Responds normally to mode a or c interrogations.

exemple 407: Responds normally to mode a or c interrogations
Will not respond to mode a interrogations. responds to mode a interrogations but not to mode c interrogations. will not respond to mode a or c interrogations as it operates on a different frequency.

Question 219-24 : 'fruiting' is caused by ?

Aeroplane at range responding to interrogations from another atc radar station.

exemple 411: Aeroplane at range responding to interrogations from another atc radar station
Aeroplane in close proximity responding to the same interrogation. an aeroplane's transponder responding to side lobes or reflections of the interrogation signal. doppler effect on targets moving radially towards or away from the atc radar station.

Question 219-25 : The carrier frequency of the ssr atc reply transmission air to ground is ?

1090 mhz + or 3 mhz.

Icao annex 10 volume 4 chapter 33112 reply carrler frequency air to ground 31121 the carrier frequency of the reply transmission shall be 1 090 mhz31122 the frequency tolerance shall be plus or minus 3 mhz
exemple 415: 1090 mhz + or 3 mhz
1030 mhz + or - 2 mhz. 1020 mhz + or - 4 mhz. 1050 mhz + ou - 2 mhz.

Question 219-26 : A mode s transponder receives among other pulses a long p4 pulse from an interrogator what does this mean ?

The interrogator transmits a mode acs all call.

Short p4 pulse mode ac only all calllong p4 pulse mode acs all call
exemple 419: The interrogator transmits a mode acs all call
The interrogator transmits a mode a/c only all call. the interrogator transmits a mode s only all call. the interrogator transmits a mode a only all call.

Question 219-27 : A mode ac transponder receives a p2 pulse from which the amplitude is smaller than that of the p1 and p3 pulse what is the reason ?

The transponder is located in the direction of the main lobe of the interrogator antenna.

2621
exemple 423: The transponder is located in the direction of the main lobe of the interrogator antenna
The transponder is beyond the usable range of the ssr ground station. the interrogation is only meant for mode s transponders. the transponder is located in the direction of one of the side lobes of the interrogator antenna.

Question 219-28 : A mode ac transponder receives a p2 pulse from which the amplitude is larger than that of the p1 and p3 pulse what is the reason ?

The transponder is located in the direction of one of the side lobes of the interrogator antenna.

2621
exemple 427: The transponder is located in the direction of one of the side lobes of the interrogator antenna
The transponder is located in the direction of the main lobe of the interrogator antenna. the transponder is beyond the usable range of the ssr ground station. the interrogation is only meant for mode s transponders.

Question 219-29 : What determines the operating mode a or c of the ssr transponder ?

The time interval between the pulses p1 and p3.

2621 1666
exemple 431: The time interval between the pulses p1 and p3
The travel time of the pulses transmitted by the interrogator. the position of the spi pulse. the difference in amplitude of the pulses p1/p3 and p2.

Question 219-30 : What is one of the differences between a mode acs all call and a mode ac only all call ?

The length of the pulse p4.

Short p4 pulse mode ac only all calllong p4 pulse mode acs all callthe time interval between the pulses p1 and p3 determines the operating mode a or c of the ssr transponder
exemple 435: The length of the pulse p4
The presence of mode a/c addresses. the time interval between the pulses p1 and p3. the presence of mode s addresses.

Question 219-31 : The time interval between the interrogating pulses p1 and p3 in mode c is ?

21 us.

1666
exemple 439: 21 us
8 us. 1.6 us. 0.8 us.

Question 219-32 : The time interval between the interrogating pulses p1 and p3 in mode a is ?

8 us.

1666
exemple 443: 8 us
21 us. 1.6 us. 0.8 us.

Question 219-33 : Ssr transpondermode s provides ?

25 possible reply forms.

exemple 447: 25 possible reply forms
50 possible reply forms. 100 possible reply forms. 3 possible reply forms.

Question 219-34 : The equipment that uses the pulse modulation technique is the ?

Radar.

Pulse modulation a modulation form used in radar by transmitting short pulses followed by larger interruptions
exemple 451: Radar
Vor. localizer. vhf radio.

Question 219-35 : Ssr transponderin intermode a short p4 pulse makes it possible to perform a call ?

Ac.

exemple 455: Ac
A/c/s. mode s only. c.

Question 219-36 : Ssr transpondera mode ac transponder ?

Responds to mode s interrogations but can not send data.

exemple 459: Responds to mode s interrogations but can not send data
Responds to mode s interrogations with limited data. does not respond to mode s because frequency is different. does not respond to mode s interrogations.

Question 219-37 : The main advantage of ssr over a primary radar is ?

Air traffic control ssr systems can interrogate the transponder of an aircraft and obtain answers.

exemple 463: Air traffic control ssr systems can interrogate the transponder of an aircraft and obtain answers
Air traffic control ssr systems continually interrogating the aircraft in range, the follow-up is uninterrupted. air traffic control ssr systems can respond to an aircraft interrogation and provide the required information. ssr has the ability to discriminate mobile targets (moving target indicators - mti), which eliminates returns and permits to track more aircraft.

Question 219-38 : What is the accuracy of mode s altitude reporting ?

25 feet.

Mode s can provide enhanced vertical tracking using a 25 feet altitude increment
exemple 467: 25 feet
200 feet. 100 feet. 50 feet.

Question 219-39 : To increase the maximum range of a radar it is necessary to ?

Decrease the recurrence frequency and to increase the wavelength.

exemple 471: Decrease the recurrence frequency and to increase the wavelength
Decreases the recurrence frequency and the wavelength. increase the recurrence frequency and the wavelength. increase the recurrence frequency and to decrease the wavelength.

Question 219-40 : Ssr transponderwith the 'enhanced' mode s additional aircraft parameters can be downloaded by the atc ?

Ias vertical rate roll angle.

Ecqb04 november 2017enhanced mode s surveillance consists of the extraction of additional aircraft parameters known as downlink aircraft parameters dap consisting of magnetic heading indicated airspeed mach number vertical rate roll angle track angle rate true track angle ground speed selected altitudenote tas is provided if track angle rate is not available
Angle of attack, pitch angle, ground speed. fuel remaining, oat. cross track error, usable fuel, pitch angle.



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