Vayudoot Aviation

1. The position used by the FMC in the B737-400 is

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.

an average of the two IRS positions

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

twin DME

Any of the above

Twin VOR

VOR/DME

3. The period of validity of the navigational database is

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

1 month

28 days

91 days

4. The FMC position will be at its most inaccurate

at TOD

on take-off

at TOD

at TOC

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

to ease the pilot's workload

because the magnetic variation changes rapidly in high latitudes

to improve the system accuracy

to prevent error messages as the IRS longitudes show large differences

6. The FMC navigational database can be accessed by the pilots

to update the database

to read information only

to change the information to meet the sector requirements

to change information between the 28 day updates

7. The accuracy required of a precision area navigation system is

0.5 nm

2 nm

0.25 nm

1 nm

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

N5000E00527

N50E00527

N5000.0E00527.0

5000.0N00527.0E

9. Concerning FMC operation, which of the following is true

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 long term accuracy of the external reference

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

10. The sequence of displays accessed on initialisation is

POS INIT, RTE, IDENT

POS INIT, IDENT, RTE

IDENT, RTE, POS INIT

IDENT, POS INIT, RTE

11.
Refer to Appendix A. What are the correct selections to insert the most accurate position into the IRS?

3R then 4R

2R then 4R

3L then 4R

4R then 3R

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

50 nm

60 nm

10 nm

25 nm

13. 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

20 nm

25 nm

30 nm

15 nm

14. The IRS position can be updated

on the ground and overhead VOR/DME

on the ground only

at designated positions en-route and on the ground

at selected waypoints and on the ground

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

Navigation facilities, reporting points and airways designators

SIDS & STARS and latitude and longitude

Latitude and longitude, reporting points and airways designators

SIDS & STARS, reporting points and airways designators

Question Bank

Questions for RNAV