DME – Air – DGCA Question Bank For Politics

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HD Quiz powered by harmonic design

#1. A DME station is located 1000 feet above MSL. An aircraft flying at FL 370, 15 NM away from the DME station, will have a DME reading of?

14 NM.

15NM.

16NM.

17NM.

#2. Which of the following will give the most accurate calculation of aircraft ground speed?

An ADF sited on the flight route.

A DME station sited on the flight route.

A VOR station sited on the flight route.

A DME station sited across the flight route.

#3. In the which situation will speed indications on an airborne Distance Measuring Equipment (DME) most closely represent the groundspeed of an aircraft flying at FL400?

When tracking directly towards the station at a range of 100 NM or more.

When passing abeam the station and within 5 NM of it.

When overhead the station, with no change of heading at transit.

When tracking directly away from the station at range of 10 NM.

#4. The time taken for the transmission of an interrogation pulse by a distance Measuring Equipment (DME) to travel to the ground transponder and return to the airborne receiver was 2000 microsecond. The slant range from the ground transponder was?

165 NM.

186 NM.

296 NM.

330 NM.

#5. The time taken for the transmission of an interrogation pulse by a Distance Measuring Equipment (DME) to travel to the ground transponder and return to the airborne receiver was 3000 microsecond. The slant range from the ground transponder was?

186 NM.

243 NM.

296 NM.

330 NM.

#6. The time taken for the transmission of an interrogation pulse by a Distance Measuring Equipment (DME) to travel to the ground transponder and return to the airborne receiver was 4000 microsecond. The slant range from the ground transponder was?

186 NM.

296 NM.

324 NM.

330 NM.

#7. A DME station is located 1000 feet above MSL. An aircraft flying at FL 310,20 NM away from the DME station, will have a DME reading of?

20.61 NM.

21.35 NM.

15 NM.

17 NM.

#8. A DME station is located 7000 feet above MSL. An aircraft flying at FL 430 , 20 NM away from the DME station, will have DME reading?

15 NM.

17 NM,

20.88 NM.

21.35 NM.

#9. A DME station is located 2000 feet above MSL. An aircraft flying at FL 200, 10 NM away from the DME station, will have a DME reading of?

10.44 NM.

11.35 NM.

13.44 NM.

12 NM.

#10. An aircraft DME receiver does not lock on to its own transmissions reflected from the ground because:

DME transmits twin pulses.

They are not on the receiver frequency.

The pulse recurrence rate are varied.

DME uses the UHF band.

#11. The DME (Distance Measuring Equipment) operates within the following frequencies:

108 to 118 MHz.

329 to 335 MHz.

962 to 1213 kHz.

962 to 1213 MHz.

#12. A DME is located at MSL. An aircraft passing vertically above the station at flight level FL 360 will obtain a DMF range of approximately?

7 NM.

11 NM.

6 NM.

8 NM.

#13. During a flight at FL 210, a pilot does not receive any DME distance indication from a DME station located approximately 220 NM away. The reason for this is that the?

Aeroplane is below the 'line of sight' altitude

Aeroplane is circling around the station

Altitude is too high

Range of a DME system is always less than 200 NM

#14. A typical frequency employed in Distance Measuring Equipment (DME) is:

10 MHz.

1000 MHz.

100 MHz.

100 GHz.

#15. Distance Measuring Equipment (DME) operates in the:

VHF band and uses the principle of phase comparison.

UHF band and is a primary radar system.

SHF band uses frequency modulation techniques.

UHF band and is a secondary radar system.

#16. For a conventional DME facility 'Beacon saturation' will occur whenever the number of simultaneous interrogation exceeds:

100.

200.

60.

80.

#17. On a DME, display counters rotating throughout their range indicates:

Airborne equipment failure.

The airborne receiver is conducting a range search.

Ground equipment failure.

The airborne equipment is conducting a frequency search.

#18. The aircraft DME receiver is able to accept replies to its own transmissions and reject replies to other aircraft interrogations because:

Pulse pairs are amplitude modulated with the aircraft registration.

Pulse pairs are discreet to a particular aircraft.

Aircraft interrogation signals and transponder responses are 63 MHz removed from each other.

Transmission frequencies are 63 MHz different for each aircraft.

#19. The aircraft DME receiver cannot lock on to interrogation signal reflected from the ground because:

Aircraft transmitter and DME ground station are transmitting on different frequencies.

Reflections are subject to doppler frequency shift.

DME transmits twin pulses.

DME pulse recurrence rate are varied.

#20. The design requirements for DME stipulate that, at a range of 100 NM, the maximum systematic error should not exceed:

+ or - 1.5 NM.

+ or - 3 NM.

+ or - 0.25 NM.

+ or - 1.25 NM.

#21. Distance Measuring Equipment (DME) uses radar principles to measure distance?

Horizontally.

Vertically.

Slant range.

Plan range.

#22. ICAO specifications are that range errors indicated by Distance Measuring Equipment (DME) should not exceed:

+ or - 0.5 NM or 3% of the distance measured whichever is the greater.

+ or - 0.25 NM plus 1.25% of the distance measured.

+ or - 1.25 NM plus 0.25% of the distance measured.

+ or - 0.25 NM plus 3% of the distance measured up to a maximum of 5 NM.

#23. What is the maximum distance between VOR and DME/TACAN ground installations if they are to have the same morse code identifier?

600 m.

2000 m.

60 m.

300 m.

#24. A DME in tracking mode subsequently experiences a reduction in signal strength will switch the equipment in the first instance to:

Memory mode.

Search mode.

Standby mode.

Signal controlled search.

#25. Of what use, if any, is a military TACAN station to civil aviation?

It is of no use to civil aviation.

It can provide a DME distance and magnetic bearing.

It can provide DME distance.

It can provide a magnetic bearing.

#26. A DME that has difficulty obtaining a "lock-on"? (NOTE: PRF= pulse recurrence frequency, PPS= pulses per second)

Stays in search mode without a reduction in PRF.

Stays in search mode but reduces PRF to max. 60 PPS after 100 seconds.

Alternates search mode with periods of memory mode lasting 10 seconds.

Stays in search mode but reduces PRF to max. 60 PPS after 15000 pulse pairs have been transmitted.

#27. DME channels utilise frequencies of approximately:

1000 MHz.

300 MHz.

110 MHz.

600 MHz.

#28. A VOR and DME are co-located. You want to identify the DME by listening to the callsign. Having heard the same callsign 4 times in 30 seconds the?

DME callsign was not transmitted, the distance information is sufficient proof of correct operation.

DME callsign is the one with the lower pitch that was broadcast several times VOR and DME callsigns were the same and broadcast with the same pitch.

The VOR IDENT is transmitted three times followed by the DME IDENT transmitted once.

DME callsign is the one with the higher pitch that was broadcast only once.

#29. Which one is the most correct statement regarding the range of the DME system?

Operates on the principle of phase comparison.

Range within "line of sight" and maximum 200 nm.

Operates on VHF.

Has unlimited range due to ground wave propagation.

#30. The indicated range from a DME station is?

Slant range.

Ground range only if the beacon is co-located with a VOR.

0 when passing overhead the station.

Ground range.

#31. Regarding the DME system, which one of the following statement is true?

The DME measures the phase difference between the reference and the variable signals to calculate the distance.

DME operates in the VHF frequency band.

The transponder reply carrier frequency differs by 63 MHz from that of the interrogation signal.

When passing overhead the DME station the DME will indicate 0.

#32. The design requirements for DME stipulate that, at a range of 100 nm the maximum systemic error should not exceed?

Not more than +/- 1.25 nm.

Not more than +/- 1.5 nm.

Not more than +/- 3 nm.

Not more than +/- 0.25 nm.

#33. A DME is located at MSL. An aircraft passing vertically above the station at flight level 360 will obtain a DME range of approximately?

11 nm.

8 nm.

7 nm.

6 nm.

#34. A DME station is located 1000 ft above MSL. An aircraft which is flying at FL 370 in ISA conditions, is 15 nm away from the DME station, will have a DME reading of?

14 nm.

15 nm.

16 nm.

17 nm.

#35. In which situation will speed indication will speed indications on an airborne Distance Measuring Equipment (DME) most closely represent the groundspeed of an aircraft flying at FL 440?

When tracking directly towards the station at a range of 10 nm or less.

When tracking directly towards the station at a range of 100 nm or more

When passing abeam the station within 5 nm of it.

When overhead the station, with no change of heading at transit.

#36. The time taken for the transmission of an interrogation pulse by a distance Measuring Equipment (DME) to travel to the ground transponder and return to the airborne receiver was 2000 microseconds. The slant range from the ground transponder is?

158 nm.

330 nm.

296 nm.

186 nm.

#37. An aircraft passes overhead a DME station at 12000 ft above the station. At that time the DME reading will be?

FLAG/OFF, the aircraft is within the cone of silence.

Approximately 2 nm.

Fluctuating and not significant.

0 nm.

#38. When flying 6000 ft above a ground level, the DME indicates 5 nm, what is the horizontal distance from the aircraft to overhead the DME?

4.9 nm.

4.3 nm.

4.6 nm.

5.2 nm.

#39. Distance Mesuring Equipment (DME) operates in the?

UHF band and uses one frequency.

VHF band and uses the principle of phase comparison.

UHF band and uses two frequencies.

SHF and uses the frequency modulation techniques.

#40. An aircraft at FL 300, with a groundspeed of 300 kts, is about to pass overhead a DME station at MSL, The dame receiver is capable of determining ground speed. One minute before the overhead, DME speed and distance indication respectively are?

300 kts and 5 nm.

less than 300 kts and 5 nm.

300 kts and 7 nm.

less than 300 kts and 7 nm.

#41. An aircraft at FL410 is passing overhead a DME station at mean sea level. The DME indication will be approximately?

6.8 nm.

6.1 nm.

6.8 km.

6.1 km.

#42. An aircraft is flying directly overhead a DME station at FL380. The indicated range will be approximately?

6.3 nm.

6.3 km.

5.1 nm.

5.1 km.

#43. Which one the statements below is correct regarding the DME?

The indicated distance is the ground distance measured from the aircraft's projected position on the ground to the DME ground installation.

The DME operating frequencies are in the UHF frequency band.

Two lines of position obtained from two different DME's give an unambiguous fix.

The DME ground station is always co-located with a VOR station.

#44. The selection of the DME frequency for a ILS/DME installation is as follows?

The pilot has to insert the channel number and also the X or Y.

When an ILS/DME is flown then the selection of the DME has always to be done manually.

The DME frequency has to be selected by the pilot.

The DME frequency is paired with the localiser frequency so only the localiser frequency is set.

#45. The effect of masking the DME antenna of the aircraft from the ground installation is that interruption of reception of DME signals results in?

The ground installation not sending any pulse-pairs.

The airborne installation switching to the memory mode for about 10 to 15 seconds.

The airborne installation switching directly to the search mode.

The signal controlled search circuit (SCS) blanking the DME display.

#46. Which statement about the interrogation by DME interrogator is correct?

The interrogation starts when the interrogator has been warmed up sufficiently, whether pulse-pairs are received or not.

The interrogation does not start before pulse-pairs of the tuned DME station are received.

The interrogation can only take place if the Echo protection circuit has been locked.

The interrogation starts directly after the correct DME frequency has been selected on the frequency-selected panel by the pilot.

#47. The ident of a DME in case of collocation with a VOR is as follows?

In 30 seconds the DME ident comes up 3 times at an audio frequency of 1350 Hz.

In 40 seconds the DME ident will sound once.

In case of collocation the DME ident is not necessary if the VOR ident is present.

The DME ident comes every 10 seconds at an audio frequency of 1020 Hz.

#48. With respect to the principle of distance measurement equipment DME it can be stated that: 1.The interrogation signal is transmitted on the same frequency as the reply signal. 2.The DME station always has a transponder delay of 50 milliseconds. 3.The time between the pulse pairs of the interrogation signal is at random. 4.In the search mode more pulse pairs per second are transmitted than in the tracking mode. Which of the above given statement are correct?

1,2,3 and 4.

1 and 2.

2,3 and 4.

3 and 4.

#49. A fix obtained by rho-rho navigation is based on information from two?

NDBs.

VDFs.

DMEs.

VORs.

#50. The reason for using different frequencies for the airborne and ground equipment of DME is?

To avoid second trace returns when a DME is more than 200 nm away.

The more DME frequencies are available from different beacons.

That side lobes can be suppressed by the side lobe suppressor (SLS).

To prevent that DMR interrogation pulse pairs from being received by the aircraft after reflection on the earth's surface.

#51. How can a DME interrogator distipulsenguish between its own reply pulse-pairs and the reply pulse-pairs of other aircraft in the area, using the same DME station?

The pulse repetition frequency of the pulse-pairs transmitted by the interrogator varies, for each interrogator there is a unique rhythm.

On the Y-channel the time interval between the pulses of an interrogator pulse-pair is 36 m/sec an of a transponder pulse-pair 30 m/sec.

The DME transponder uses a slightly different, randomly varying, delay for each interrogating aircraft.

The time-interval between both pulses of consecutive pulse-pairs transmitted by the interrogator varies, for each interrogator the is a unique rhythm.

#52. The DME line of Position is a circle with radius?

The slant range and centre the aircraft.

The slant range and centre the DME station.

A ground distance and centre the DME station.

The ground distance and centre the aircraft.

#53. What is the function of the Echo Protection Circuit (EPC)?

The EPC has to detect if the interrogator-receiver has been locked on, by reflected pulse-pairs.

The EPC has to detect if unwanted squitter-pulses are interfering with the well functioning of the interrogator-receiver.

The EPC has to detect if pulse-pairs reflected by the ionosphere are interfering with directly received pulse-pairs.

The EPC has to protect the transponder-receiver against reflected pulse-pairs.

#54. During a flight at FL260, a pilot does not receive any DME distance indication from a DME station located approximately 220 nm away. The reason for this is that?

Altitude is too high.

Aeroplane is circling around the station.

Range to DME stations is always less than 200 nm.

Aeroplane is below the line-of-sight altitude.

#55. . An aircraft flying at FL180 is 190 nm from a DME (located at 0 feet AMSL). The aircraft equipment fails to lock on, this is because?

The aircraft is too low to receive the signal.

The beacon is saturated.

DME is limited to 200 nm.

The aircraft is too high to receive the signal.

#56. DME is a radar type of facility and its maximum range is limited by?

The receiver sensitivity.

The pulse repetition interval.

The height of the aeroplane.

The transmitter power only.

#57. An aircraft at FL310 cannot receive a signal from a DME 240 nm away. Why?

The DME is saturated.

The aircraft is too high.

DME is never more than 200 nm.

The aircraft is not in line-of-sight of the DME.

#58. The time interval between a transmitted DME pulse and the reply pulse is 120 microsecond. The slant range is?

5.7 nm.

5.7 km.

9.7 nm.

9.7 km.

#59. When an aircraft at FL360 it is directly above a DME, at mean sea level, the range display will be?

0 nm.

6 nm.

9 nm.

12 nm.

#60. An aircraft flying at FL430 obtains a DME range of 25 nm. The true range from the DME is between?

24.5 and 25.5 nm.

23.25 and 24.75 nm.

25.2 and 26.8 nm.

22.5 and 23.5 nm.

#61. The time from the transmission of a DME interrogation pulse to the receipt of the reply from the DME ground station is 1000 microseconds (ignore the delay in the DME ground station). The slant range is?

81 nm.

162 nm.

300 nm.

300 km.

#62. Given: Aircraft height = 32000 feet, DME indicated range = 16 nm. The actual true range is?

6.6 nm.

15.1 nm.

16.6 nm.

22.8 nm.

#63. The design requirements for DME stipulate that, at a range of 100 NM, the maximum systematic error should not exceed:

+ or - 3.5 NM.

+ or - 2.25 NM.

+ or - 1.5 NM.

+ or - 1.25 NM.

#64. The DME in an aircraft flying at FL430 shows a range of 15 nm from a beacon at an elevation of 167 feet. The plan range is?

13.3 nm.

15 nm.

16.5 nm.

17.6 nm.

#65. An aircraft flying at FL360 is 10 nm plan range from a DM. The DME reading in the aircraft will be?

8 nm.

10 nm.

11.7 nm.

13.6 nm.

#66. An enroute DME and VOR that have the same morse code identification are associated and are?

Within 600 feet of each other.

Within 100 feet of each other.

Always co-located.

Within 2000 feet of each other.

#67. Which of the following provides distance information?

VOR.

ADF.

VDF.

DME.

#68. The airborne DME equipment will transmit pulse pairs at a comparatively high PRF?

Which first switched on and after channel change.

At all times, except when the panel control "LO" is operated.

When the distance presented is above 50 nm.

Whenever a stable signal is being received from the selected ground station.

#69. When VOR and DME station are associated?

Their aerials will be mounted on top of each other.

Their IDS will be in all respects identical.

They may be separated by as much as 600 metres if they are meant for enroute navigation.

Their signals must be tuned in by VOR and DME sets in the aircraft having common frequency control.

#70. The PRF increases and the range counters count up to the maximum.

The PRF increases and the range counters count down from the maximum and the power decreases.

The PRF decreases and the range counters count down from the maximum and the power increases.

The PRF increases and the power is increased.

When VOR and DME station are associated?

#71. The DME counters are rotating continuously. This indicates?

The DME is trying to lock onto a frequency.

The DME is unserviceable.

The DME is trying to lock onto a range.

The DME is receiving no response from the ground station.

#72. Where a DME uses mechanical counters for displaying the range, continuous rotation of the counters means?

The DME is in the search mode.

The DME is in the tracking mode due to a turn.

The DME is in memory mode.

None of the above.

#73. Consider the following statement on horizontal/slant distance when using DME?

The horizontal distance is always slightly longer than the slant distance.

The difference between the two is automatically compensated for in all DME equipment.

The difference between the two distance will be negligible for enroute Navigation when the indicated distance in NM is more than the height of the aircraft in thousands of feet.

The operator in the aircraft should always make a mental increase to the indicated range, in order to compensate for the difference between the horizontal distance and slant distance.

#74. A VOR and DME are frequency paired. The DME identification ends with Z. This denotes that?

The two beacons are greater than 2000 metres apart.

The two beacons are co-located.

The two beacons are supporting the same site, but are not co-located.

The beacons are at the same location but more than 1000 metres apart.

#75. The most accurate measurement if ground speed by DME for an aircraft at 30000 feet will be when the aircraft is?

Overhead the beacon.

Passing abeam the beacon at 50 nm.

Tracking towards the beacon at 10 nm.

Tracking away from the beacon at 100 nm.

#76. In which of the following bands does DME operate?

VHF.

UHF.

SHF.

EHF.

#77. DME is a .. Radar which, provides .. Distances between the aircraft and a ground ..?

Primary, slant, transponder.

Secondary, earth, transponder.

Secondary, slant, transponder.

Primary, accurate, transmitter.

#78. DME pulses are transmitted as pulse pairs. This is done?

To increases the range.

To prevent lock onto the ground.

So that pulses are square and easily identified.

So that any radar emissions do not interfere with the DME equipment.

#79. By using a random PRG the airborne DME can?

Recognise a beacon's reply among a mass of ground returns.

Prevent interference from random transmissions.

Distinguish between its own replies and those replies triggered by other aircraft.

Reduce the effect of weather interference.

#80. The aircraft DME receiver is able to accept replies to its own transmissions and reject replies to other aircraft interrogators because?

Pulse pairs are amplitude modulated with the aircraft registration.

Transmission frequencies are 63 MHz different for each aircraft.

Aircraft interrogation signals and transponder response signals are 63 MHz removed from each other.

The time interval between pulse pairs is unique to that aircraft.

#81. What happens when a DME in the search mode fails to achieve lock-on?

It stays in the search mode at 150 PPPs.

It stays in the search mode, but reduces to 60 pulse-pairs per second (PPPS) after 100 seconds.

It stays in the search mode, but reduces to 60 pulse-pairs per second (PPPS) after 15000 pulse pairs.

It alternates between search and memory modes every 10 seconds.

#82. Groundspeed measurement using DME equipment is most accurate when flying?

From the station at long range.

Towards the station at short range.

Directly over the station.

Past the station at short range.

#83. Which of the following will give the most accurate calculation of aircraft ground speed?

A DME on the flight plan route.

A DME off the flight plan route.

A VOR on the flight plan route.

A VOR off the flight plan route.

#84. What is the approved frequency band assigned to DME?

108 to 118 MHz.

329 to 335 MHz.

962 to 1213 kHz.

962 to 1213 MHz.

#85. When in tracking mode, the DME airborne interrogator operates at? Note: PRR = Pulse Recurrence Rate.

A PRR of 2700 PPS (Pulse Per Second).

A PRR of 150 PPS.

A PRR variable between 5 and 25 PPS.

A PRR fixed at a rate selected from the range 5 to 25 PPS.

#86. The DME ground transponder has a PRF of?

2700 pulses per second.

27 pulses per second.

150 pulses per second.

1500 pulses per second.

#87. DME is a secondary radar operating in the (i) .. band using frequencies between (ii) ......?

(i) UHF, (ii) 960 to 1215 GHz.

(i) SHF, (ii) 960 to 1215 GHz.

(i) UHF, (ii) 920 to 1215 MHz.

(i) SHF, (ii) 960 to 1215 MHz.

#88. DME uses (i) .... radar principles in the (ii) ..... band ?

(i) primary, (ii) UHF.

(i) primary, (ii) SHF,

(i) secondary, (ii) UHF.

(i) secondary, (ii) SHF.

#89. Aircraft position 34 degrees 15 minutes N 098 degrees E, magnetic variation 28 degrees W, FL280. PTV, VOR/DME position 36 degrees 12' N 098 degrees E, magnetic variation13 degrees E, In order to read the most accurate ground speed given by the DME receiver from his present position, the pilot must fly on which PTC radial?

167 degrees.

332 degrees.

Aircraft will not receive DME information from PTC due to the line of sight.

193 degrees.

#90. Aircraft position 52 degrees 09 minutes S 024 degrees E, magnetic variation 14 degrees W, FL310. BIT VOR/DME position 54 degrees 42'S 024 degrees E, magnetic variation 14 degrees E. In order to read the most accurate ground speed given by the DME receiver from his present position, the pilot must fly on which BIT radial?

346 degrees.

194 degrees.

166 degrees.

166 degrees

#91. Aircraft position 36 degrees 15 minutes S 178 degrees E, magnetic variation 00021 degrees W, FL310. UEB VOR/DME position 36 degrees 15'S 178 degrees W, magnetic variation 21 degrees E. In order to read the most accurate ground speed given by the DME receiver from his present position, the pilot must fly on which UEB radial?

069 degrees.

111 degrees.

249 degrees.

291 degrees.

#92. The maximum number of aeroplanes that can be responded to by the DME ground facility is?

10.

100.

150.

unlimited.

#93. What are the DME frequencies?

960 to 1090 MHz.

1030 to 1215 MHz.

690 to 1215 MHz.

960 to 1215 MHz.

#94. In a certain VORTAC installation the VOR station is identified as "STN" and the DME station is identified as "STZ". This means that the distance between the two beacons is in excess of?

100 m.

300 m.

600 m.

2000 m.

#95. How many aircraft will DME accommodate before reaching saturation?

50.

100.

120.

150.

#96. What is the slant range error for an aircraft at 9000 feet absolute above a DME located at elevation 2000 feet, when the slant range is 12 nm?

0.09 nm.

0.31 nm.

0.57 nm.

1.42 nm.

#97. The nominal maximum coverage of a DME station is?

190 nm at 20,000 feet.

215 nm at 25,000 feet.

210 nm at 30,000 feet.

230 nm at 30,000 feet.

#98. Ground DME responders respond at a frequency?

63 MHz higher than the interrogation signal.

63 MHz lower than the interrogation signal.

The same as the interrogation signal.

63 MHz different from the interrogation signal, above or below.

#99. If a DME beacon becomes saturated by interrogations it?

Replies to the nearest 100 aircraft.

Adjusts its PRF to cope with all aircraft.

Switches off its identification.

Adjusts the gain to reply to the 100 strongest signals.

#100. The reason for using different frequencies for transmitting and receiving in the DME system is to?

Avoid the reception in the aircraft of signals referring to other aircraft.

Prevent self-triggering of the receiving equipment by the transmitter.

Prevent overload of the system.

Permit more channels in the system.

Finish

Dgca Question Bank For Pilots

Results

#1. A DME station is located 1000 feet above MSL. An aircraft flying at FL 370, 15 NM away from the DME station, will have a DME reading of?

#2. Which of the following will give the most accurate calculation of aircraft ground speed?

#3. In the which situation will speed indications on an airborne Distance Measuring Equipment (DME) most closely represent the groundspeed of an aircraft flying at FL400?

#4. The time taken for the transmission of an interrogation pulse by a distance Measuring Equipment (DME) to travel to the ground transponder and return to the airborne receiver was 2000 microsecond. The slant range from the ground transponder was?

#5. The time taken for the transmission of an interrogation pulse by a Distance Measuring Equipment (DME) to travel to the ground transponder and return to the airborne receiver was 3000 microsecond. The slant range from the ground transponder was?

#6. The time taken for the transmission of an interrogation pulse by a Distance Measuring Equipment (DME) to travel to the ground transponder and return to the airborne receiver was 4000 microsecond. The slant range from the ground transponder was?

#7. A DME station is located 1000 feet above MSL. An aircraft flying at FL 310,20 NM away from the DME station, will have a DME reading of?

#8. A DME station is located 7000 feet above MSL. An aircraft flying at FL 430 , 20 NM away from the DME station, will have DME reading?

#9. A DME station is located 2000 feet above MSL. An aircraft flying at FL 200, 10 NM away from the DME station, will have a DME reading of?

#10. An aircraft DME receiver does not lock on to its own transmissions reflected from the ground because:

#11. The DME (Distance Measuring Equipment) operates within the following frequencies:

#12. A DME is located at MSL. An aircraft passing vertically above the station at flight level FL 360 will obtain a DMF range of approximately?

#13. During a flight at FL 210, a pilot does not receive any DME distance indication from a DME station located approximately 220 NM away. The reason for this is that the?

#14. A typical frequency employed in Distance Measuring Equipment (DME) is:

#15. Distance Measuring Equipment (DME) operates in the:

#16. For a conventional DME facility 'Beacon saturation' will occur whenever the number of simultaneous interrogation exceeds:

#17. On a DME, display counters rotating throughout their range indicates:

#18. The aircraft DME receiver is able to accept replies to its own transmissions and reject replies to other aircraft interrogations because:

#19. The aircraft DME receiver cannot lock on to interrogation signal reflected from the ground because:

#20. The design requirements for DME stipulate that, at a range of 100 NM, the maximum systematic error should not exceed:

#21. Distance Measuring Equipment (DME) uses radar principles to measure distance?

#22. ICAO specifications are that range errors indicated by Distance Measuring Equipment (DME) should not exceed:

#23. What is the maximum distance between VOR and DME/TACAN ground installations if they are to have the same morse code identifier?

#24. A DME in tracking mode subsequently experiences a reduction in signal strength will switch the equipment in the first instance to:

#25. Of what use, if any, is a military TACAN station to civil aviation?

#26. A DME that has difficulty obtaining a "lock-on"? (NOTE: PRF= pulse recurrence frequency, PPS= pulses per second)

#27. DME channels utilise frequencies of approximately:

#28. A VOR and DME are co-located. You want to identify the DME by listening to the callsign. Having heard the same callsign 4 times in 30 seconds the?

#29. Which one is the most correct statement regarding the range of the DME system?

#30. The indicated range from a DME station is?

#31. Regarding the DME system, which one of the following statement is true?

#32. The design requirements for DME stipulate that, at a range of 100 nm the maximum systemic error should not exceed?

#33. A DME is located at MSL. An aircraft passing vertically above the station at flight level 360 will obtain a DME range of approximately?

#34. A DME station is located 1000 ft above MSL. An aircraft which is flying at FL 370 in ISA conditions, is 15 nm away from the DME station, will have a DME reading of?

#35. In which situation will speed indication will speed indications on an airborne Distance Measuring Equipment (DME) most closely represent the groundspeed of an aircraft flying at FL 440?

#36. The time taken for the transmission of an interrogation pulse by a distance Measuring Equipment (DME) to travel to the ground transponder and return to the airborne receiver was 2000 microseconds. The slant range from the ground transponder is?

#37. An aircraft passes overhead a DME station at 12000 ft above the station. At that time the DME reading will be?

#38. When flying 6000 ft above a ground level, the DME indicates 5 nm, what is the horizontal distance from the aircraft to overhead the DME?

#39. Distance Mesuring Equipment (DME) operates in the?

#40. An aircraft at FL 300, with a groundspeed of 300 kts, is about to pass overhead a DME station at MSL, The dame receiver is capable of determining ground speed. One minute before the overhead, DME speed and distance indication respectively are?

#41. An aircraft at FL410 is passing overhead a DME station at mean sea level. The DME indication will be approximately?

#42. An aircraft is flying directly overhead a DME station at FL380. The indicated range will be approximately?

#43. Which one the statements below is correct regarding the DME?

#44. The selection of the DME frequency for a ILS/DME installation is as follows?

#45. The effect of masking the DME antenna of the aircraft from the ground installation is that interruption of reception of DME signals results in?

#46. Which statement about the interrogation by DME interrogator is correct?

#47. The ident of a DME in case of collocation with a VOR is as follows?

#49. A fix obtained by rho-rho navigation is based on information from two?

#50. The reason for using different frequencies for the airborne and ground equipment of DME is?

#51. How can a DME interrogator distipulsenguish between its own reply pulse-pairs and the reply pulse-pairs of other aircraft in the area, using the same DME station?

#52. The DME line of Position is a circle with radius?

#53. What is the function of the Echo Protection Circuit (EPC)?

#54. During a flight at FL260, a pilot does not receive any DME distance indication from a DME station located approximately 220 nm away. The reason for this is that?

#55. . An aircraft flying at FL180 is 190 nm from a DME (located at 0 feet AMSL). The aircraft equipment fails to lock on, this is because?

#56. DME is a radar type of facility and its maximum range is limited by?

#57. An aircraft at FL310 cannot receive a signal from a DME 240 nm away. Why?

#58. The time interval between a transmitted DME pulse and the reply pulse is 120 microsecond. The slant range is?

#59. When an aircraft at FL360 it is directly above a DME, at mean sea level, the range display will be?

#60. An aircraft flying at FL430 obtains a DME range of 25 nm. The true range from the DME is between?

#61. The time from the transmission of a DME interrogation pulse to the receipt of the reply from the DME ground station is 1000 microseconds (ignore the delay in the DME ground station). The slant range is?

#62. Given: Aircraft height = 32000 feet, DME indicated range = 16 nm. The actual true range is?

#63. The design requirements for DME stipulate that, at a range of 100 NM, the maximum systematic error should not exceed:

#64. The DME in an aircraft flying at FL430 shows a range of 15 nm from a beacon at an elevation of 167 feet. The plan range is?

#65. An aircraft flying at FL360 is 10 nm plan range from a DM. The DME reading in the aircraft will be?

#66. An enroute DME and VOR that have the same morse code identification are associated and are?

#67. Which of the following provides distance information?

#68. The airborne DME equipment will transmit pulse pairs at a comparatively high PRF?

#69. When VOR and DME station are associated?

#70. The PRF increases and the range counters count up to the maximum.

#71. The DME counters are rotating continuously. This indicates?

#72. Where a DME uses mechanical counters for displaying the range, continuous rotation of the counters means?

#73. Consider the following statement on horizontal/slant distance when using DME?

#74. A VOR and DME are frequency paired. The DME identification ends with Z. This denotes that?

#75. The most accurate measurement if ground speed by DME for an aircraft at 30000 feet will be when the aircraft is?

#76. In which of the following bands does DME operate?

#77. DME is a .. Radar which, provides .. Distances between the aircraft and a ground ..?

#78. DME pulses are transmitted as pulse pairs. This is done?

#79. By using a random PRG the airborne DME can?