RNAV – Air – DGCA Question Bank For Politics

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#1. The accuracy required of a precision area navigation system is:

0.25 nm

2 nm

1 nm

0.5 nm

#2. A basic 2D RNAV system will determine tracking information from:

twin DME

VOR/DME

Twin VOR

Any of the above

#3. An aircraft using a basic 2D RNAV system is on a section between WP1 and WP2, a distance of 45 nm. The aircraft is 20nm from the phantom station, which is 270°/30 nm from the VOR/DME. The aircraft is 15nm from the VOR/DME. The range readout will show:

15 nm

20 nm

25 nm

30 nm

#4. The sequence of displays accessed on initialisation is:

POS INIT, IDENT, RTE

IDENT, RTE, POS INIT

IDENT, POS INIT, RTE

POS INIT, RTE, IDENT

#5. The IRS position can be updated:

on the ground only

at designated positions en-route and on the ground

on the ground and overhead VOR/DME

at selected waypoints and on the ground

#6. Refer to Appendix A. What are the correct selections to insert the most accurate position into the IRS?

3R then 4R

2R then 4R

4R then 3R

3L then 4R

#7. The position used by the FMC in the B737-400 is:

an average of the two IRS positions

an average of the two IRS positions, smoothed by the Kalman filtering process.

taken from the selected IRS, smoothed by Kalman filtering and updated to the external reference

generated from the external reference and updated by the IRS as part of the Kalman filtering process.

#8. The FMC position will be at its most inaccurate:

on take-off

at TOC

at TOD

#9. Which positions can be input to the FMC using a maximum of 5 alpha-numerics?

SIDS & STARS, reporting points and airways designators

Navigation facilities, reporting points and airways designators

SIDS & STARS and latitude and longitude

Latitude and longitude, reporting points and airways designators

#10. The FMC navigational database can be accessed by the pilots:

to update the database

to read information only

to change information between the 28 day updates

to change the information to meet the sector requirements

#11. Above latitudes of 84° a twin FMS/triple IRS system will go to de-coupled operations. The reason for this is:

to prevent error messages as the IRS longitudes show large differences

to ease the pilot's workload

to improve the system accuracy

because the magnetic variation changes rapidly in high latitudes

#12. The maximum range at which VOR bearing information will be used by the B737-400 FMC for fixing is:

10 nm

25 nm

50 nm

60 nm

#13. Concerning FMC operation, which of the following is true:

the FMC combines the long term accuracy of the IRS with the short term accuracy of the external reference

the FMC combines the long term accuracy of the IRS with the long term accuracy of the external reference

the FMC combines the short term accuracy of the IRS with the short term accuracy of the external reference

the FMC combines the short term accuracy of the IRS with the long term accuracy of the external reference

#14. The correct format for the input of position 50N 00527E to the CDU is:

5000.0N00527.0E

N50E00527

N5000.0E00527.0

N5000E00527

#15. The period of validity of the navigational database is:

28 days

1 month

determined by the national authority and may be from 28 days to 91 days

91 days

Finish

Dgca Question Bank For Pilots