Email
info@vayudootaviation.com
Phone No
+91 7276526726
become a pilot
Home
About us
courses
CPL
ATPL
RTR(A)
Airline Cadet Program
IGRUA Entrance Prep
B.Sc. Aviation
Pilot Training
INDIA
USA
CANADA
SOUTH AFRICA
NEW ZEALAND
EUROPE
Aircraft Type-Rating
Airbus A320
Boeing 737
Blogs
contact
CPL Test Series
Question Bank
Questions for VDF
Answer the following questions
Test Mode
Training Mode
1. In flight, a pilot can improve the range of his transmission with a VDF operator by?
Decreasing Altitude.
Speaking louder
Increasing altitude.
Flying out of clouds.
2. What airborne equipment, if any, is required to be fitted in order that a VDF let-down may be flown?
VOR/DME
VHF radio
None
VOR
3. To provide a pilot with the position of the aircraft in the absence of radar, ATC must have at its disposal at least?
Two VDFs at different locations, able to take bearings simultaneously on the transmitted frequency.
Two co-located VDFs, able to take bearings simultaneously on te transmitted frequency.
One VDF able to take bearings simultaneously on different frequencies.
Three VDFs at different locations, able to take bearings simultaneously on different frequency.
4. When conducting a QGH approach responsibility for interpreting the procedure rests with ..... And on a QDM approach responsibility rests with.....?
The pilot, the controller.
The pilot, the pilot.
The controller, the controller.
The controller, the pilot.
5. An aircraft wishing to use the VDF service must?
Transmit a signal for a long enough period for the bearing to be established.
By within 10 nautical miles of the VDF aerial.
Ask the controller to transmit for a long enough period to establish the bearing.
Be equipped with a VOR indicator unit.
6. In the VDF system directional antennas are used?
At the ground installation.
No directional antennas are used.
In the aircraft.
In the aircraft and at the ground installation.
7. Given: Compass heading 270° Deviation 2°W. Variation 30°E. Relative bearing of VDF station from the aircraft 316°. What is the QDR?
046°
224°
226°
044°
8. Range of VDF depends on? 1. Loudness of the voices of the pilots and the operator when transmitting. 2. power of airborne and ground transmitters. 3. power of pilot voice when transmitting. 4. aircraft altitude and ground transmitter elevation. The combination regrouping all of the correct statements is?
2
2 and 4.
1
3 and 4.
9. What is the purpose of a ground direction finder?
To map airfields.
To assist planners in the construction of airfield approaches.
To aid pilot navigation.
To aid ground movements.
10. What is the minimum level that an aircraft, at a range of 112 NM, must fly in order to contact the tower on R/T for a VDF bearing from an airport sited 144 FT above MSL?
FL60
FL90
FL100
FL100
11. Abnormal long ranges may be experienced on VDF channels, caused by?
The VDF station using a relay station for communication to the aircraft.
Intermodulation with signals on frequencies close to the one being used by the VDF station.
Efficient VDF antennas.
Super refraction of the signals in the atmosphere.
12. When would VDF be used for a position fix?
When the aircraft declares an emergency on any frequency.
When declaring an emergency on 121.5 MHz.
When first talking to an FIR on crossing an international boundary
When joining controlled airspace from uncontrolled airspace.
13. What airborne equipment, if any, is required to be fitted on order that a VDF let-down may be flown?
VOR/DME
None
VOR
VHF Radio
14. The VDF homer service provides?
Bearings, which will normally be within +/-5 degrees accuracy to a 20 nm range.
A QGH procedure to transiting aircraft.
Bearings, which may be affected by synchronous transmissions.
Accurate bearing on demand.
15. In ISA conditions, what is the maximum theoretical range at which an aircraft at FL80 can expect to obtain bearings from a ground VDF facility sited 325 ft above msl?
158 nm.
107 nm.
134 nm.
114 nm.
16. VDF accuracy may be decreased by?
Diurnal variation.
Site and propagation errors
Coastal effect
Night effect
17. Range of VDF depends on? 1. Line of sight formula. 2. Power of transmitter. 3. Intervening high ground. The combination regrouping all of the correct statements is?
2.
1,2 and 3.
1 and 2.
1 and 3.
18. What is the approximate maximum theoretical range at which an aircraft at FL240 could receive information from a VDF facility, which is sited 1023 FT above MSL?
210 NM
223 NM
120 NM
150 NM
19. Which Q code would give a true track from a VDF station?
QDM
QUJ
QDR
QTE
20. What is the minimum level that an aircraft, at a range of 133.5 NM, must fly in order to contact the tower on R/T for a VDF bearing from an airport sited 144 FT above MSL?
FL60
FL80
FL100
FL90
21. The VDF Class B bearing is accurate to within?
+/- 2 degrees.
+/- 1 degrees.
+/- 5 degrees.
+/- 3 degrees.
22. If a ground D/F controller passes a bearing thus: "your true bearing is 256 degrees, class Alpha . "This means?
QTE accurate to +/-5 degrees.
QUK accurate +/-3 degrees.
QTE accurate to +/-2 degrees.
QDR accurate +/-2 degrees.
23. What is the approximate maximum theoretical range at which an aircraft at FL120 could receive information from a VDF facility, which is sited 6000 FT above MSL?
175 NM.
234 NM.
210 NM.
150 Nm.
24. Which Q code would give a magnetic heading to steer (in nil wind) to a VDF station?
QDR
QTE
QDM
QUJ
25. A Class C magnetic bearing is received from a station. This is?
QDR accurate to +/-10 degrees.
QDM accurate to +/-10 degrees.
QTE accurate to +/-5 degrees.
QUJ accurate to +/-5 degrees.
26. In which one of the following circumstances is ground direction finding (VDF) likely to be used to fix an aircraft's position?
When using the emergency VHF frequency 121.5 MHz
When declaring an emergency on any frequency
On first contact with ATC on crossing an international FIR boundary
When contacting ATC to join controlled airspace from the open FIR
27. A Class B bearing has accuracy limits of plus or minus?
5 degrees.
2 degrees.
7 degrees.
3 degrees.
28. By selecting one VHF frequency, in the range 108 to 112 MHz, on the NAV receiver?
Rho-theta information from an enroute VOR/DME can be obtained.
Rho-theta information from enroute VORs can be obtained.
Rho-theta information from an ILS/DME can be obtained.
Rho-theta information from a terminal VOR/DME can be obtained.
29. What is the maximum level that an aircraft at a range of 113 nm, must fly in order to contact the tower on R/T for a VDF bearing from an airport sited at 169 ft above MSL?
FL60.
FL100
FL50.
FL80.
30. In VDF service the report "QDR 235, Class C" means?
The true bearing from the station to the aircraft is 235+/- 10 degrees.
The magnetic bearing from the station to the aircraft is 235+/- 15 degrees.
The magnetic bearing from the station to the aircraft is 235+/- 10 degrees.
The magnetic bearing from the aircraft to the station is 235+/- 10 degrees.
31. Which of the following statements regarding VHF Direction Finding (VDF) is most accurate?
It is simple and only requires a VHF radio on the ground.
It is simple and requires a VHF radio and direction finding equipment in the aeroplane.
It is simple and requires a VHF radio on the ground and in the aeroplane.
It uses line of sight propagation.
32. Which of the following is an advantage of VDF?
Only a VHF radio is required in the aircraft.
No equipment is required in the airgraft.
It is pilot interpreted, so ATC is not required.
No special equipment is required in the aircraft or on the ground.
33. An aircraft is "homing" to a radio beacon whilst maintaining a relative bearing of zero. If the magnetic heading decreases, the aircraft is experiencing?
A wind from the west.
Zero drift.
Left drift.
Right drift.
34. A VDF may be used?
To provide the ATC controller with bearing of aircraft in the absence of radar.
In lieu of ILS for precision approach purposes.
In combination with radar to solve a 180 degree ambiguity.
In emergency type situations when the aircraft is unable to transmit on VHF.
35. What is the approximate maximum theroretical range at which an aircraft at FL 130 could receive information from a VDF facility, which is sited 1024 ft above MSL?
120 nm.
150 nm.
220 nm.
180 nm.
36. What is the minimum level that an aircraft, at a range of 153 NM, must fly in order to contact the tower on R/T for a VDF bearing from an airport sited 169 FT above MSL?
FL180
FL120
FL100
FL150
37. What equipment does an aircraft need when carrying out a VDF let-down?
None.
VOR
VHF Radio.
VOR/DME
38. When the pilot is conducting a QDM/QGH procedure, he will require?
An operator on the ground only for VDF procedure.
An operator on the ground only for QGH procedure
No operator on the ground for either VDF or QGH procedures.
An operator on the ground for both VDF and QGH procedures.
39. Which Q code would give a magnetic heading from a VDF station?
QDM
QDR
QTE
QUJ
40. Ground direction finding at aerodromes utilises which frequencies?
UHF at civil aerodromes, UHF at military aerodromes.
VHF at civil aerodromes, UHF at military aerodromes.
VHF at civil aerodromes, VHF at military aerodromes.
UHF at civil aerodromes, VHF at military aerodromes.
41. What is QTE?
True track from the station.
True track to the station.
Magnetic track from the station.
Magnetic track to the station.
42. You intercept a QDM with aright crosswind component. Is your intercept heading greater or smaller than it would be without wind influence?
Not enough information to give an answer.
Remains the same.
Greater
Smaller.
43. What is the minimum level that an aircraft. at a range of 113 NM, must fly in order to contact the tower on R/T for a VDF bearing from an airport sited 169 FT above MSL?
FL60
FL100
FL50
FL80
44. What is a VDF referenced to?
Relative bearing to the aircraft.
Magnetic north at the station.
True north at the aircraft.
Magnetic north at the aircraft.
45. What is the maximum range at which a VDF station at 235 feet can provide a service to an aircraft at FL 100?
91 nm.
144 nm.
134 nm.
114 nm.
46. An aircraft receives a Class a true bearing from a VDF station. This is?
QUJ accurate to +/-2 degrees.
QUJ accurate to +/-5 degrees.
QTE accurate to +/-2 degrees.
QTE accurate to +/-5 degrees.
47. What is the effect of multipath signals (coming from the same aircraft) at the Ground VHF Direction Finder Station?
It may result in an increase in the distance at which Ground Direction Finder station receive signals from the aircraft , if the Ground Station is situated in the skip zone.
It reduces the range at which the Ground VDF Direction Finder station receives signals from the aircraft .
Regardless of the difference in distance travelled by these signals, it results in their extinction of the signals at the Ground VHF Direction Finder station.
They may result in bearing errors.
48. What is the approximate maximum theoretical range at which an aircraft at FL130 could receive information from a VDF facility, which is sited 1024 FT above MSL?
120 NM
180 NM
150 NM
220 NM
49. An aircraft is "homing" to a radio beacon whilst maintaining a relative bearing of zero. If the magnetic heading increases, the aircraft is experiencing?
Zero drift
Left drift
A wind from the west
Right drift
50. In flight a pilot can improve the range of his transmission with a VDF operator by?
Decreasing altitude.
Increasing altitude.
Flying out of clouds.
Speaking louder.
Submit
Make New Set
