Vayudoot Aviation

1.
Which white EFIS symbol below represents the aircraft?

A

B

C

D

2. In what formats can created waypoints be entered into the scratch pad of the B737-400 FMS?

Place Bearing/Distance, Place Distance/Place Distance, Along-Track Displacement, Latitude and Longitude

Place Bearing/Distance, Place Bearing/Place Bearing, Along-Track Displacement, Latitude and Longitude

Place, Place Bearing/Distance, Along-Track Displacement, Latitude and Longitude

Place Bearing/Distance, Place Bearing/Place Bearing, Across-Track Displacement, Latitude and Longitude

3. Some Inertial reference systems are known as 'strapdown'. This means

The system is mounted and fixed to the aircraft structure

The system is mounted on a stabilised platform

The accelerometers are fixed but the gyros are stabilised

The gyros are fixed but the accelerometers are stabilised

4. In an INS the process of gyro-compassing?

It is not possible in flight because the gyros cannot differentiate between acceleration due to aircraft movement and initial alignment errors

Is possible in flight as the gyros can differentiate between acceleration due to aircraft movement and initial alignment errors.

Is not possible in flight as the gyros can differentiate between acceleration due to aircraft movement and initial alignment errors

Is possible in flight as the gyros cannot differentiate between acceleration due to aircraft movement and initial alignment errors.

5. The latest point at which an INS or IRS may be selected to NAV mode is?

On operation of TOGA switch when opening the throttles for the take-off

At the holding point

After passengers and freight are aboard

Immediately prior to push back or taxi from the gate

6. On the Boeing 737-400 EFIS EHSI, on which modes is a Weather Radar Display available?

MAP, EXP VOR/ILS, EXP NAV

MAP, FULL VOR/ILS, FULL NAV

MAP, PLAMN, EXP VOR/ILS

MAP, PLAN, FULL VOR/ILS

7. The INS CDU mode selection required to display Initial Great Circle track is?

HDG/DA

TK/GS

DSRTK/STS

XTK/TKE

8. What is the source of magnetic variation information in a Flight Management System (FMS)?

The main directional gyro, which is coupled to the magnetic sensor (flux valve) positioned in the wingtip

Magnetic variation is calculated by each IRS based on the respective IRS position and the aircraft magnetic heading

Magnetic variation information is stored in each IRS memory; it is applied to the true heading calculated by the respective IRS

The FMS calculates MH and MT from the FMC position

9. In an Inertial Navigation System(INS), the output of the first stage North/South integrator is?

Latitude

Groundspeed

Change of latitude

Velocity along the local meridian

10. On the IRS, selection of ATT mode gives attitude?

Only

And heading

Altitude and heading

Heading and groundspeed

11. What can be used to enter positions on all INS systems?

Ranges and bearing

Waypoint names

Geographic coordinates

Hexadecimals

12. How long does it take to align an IRS (Laser Ring Gyros)?

10 minutes

1 minute

5 minutes

15 minutes

13. What is the function of the MCDUs in the B737-400Flight Management System when carrying out preflight checks?

Manually initialise the IRSs,FMC and Authorities with dispatch Information

Manually initialise the Flight Director System and FMC with dispatch information

Automatically initialise the IRSs and FMC with dispatch information

Manually initialise the IRSs and FMC with dispatch information

14. What format is used to enter positions into INS systems?

Ranges and bearings

Hexadecimais

Waypoint names

Geographic coordinates

15. Which of the following statements is true of a Ring Laser Gyro?

It doesn't suffer from 'lock in' and is unaffected by the earth's gravitational force

It is not necessarily fixed to the true north but takes long time to erect

It is fixed to true north and is quick to erect

It is not necessarily fixed to true north and is quick to erect

16. Which mode selection on the CDU of an INS is required to display Initial Great Circle track?

HDG/DA

XTK/TKE

TK/DS

DSRTK/STS

17. If t is the time since selecting the MSU from ALIGN to NAV the azimuth gyro heading error caused by drift rate of an INS/IRS azimuth gyro is?

Sinusoidal

Proportional to t/2

Proportional to the square root of t

Proportional to t

18. When is the last point at which an INS or IRS may be selected to NAV mode?

On operation of TOGA switch when opening the throttles for the take-off

After passengers and freight are aboard.

Immediately prior to push back or taxi from the gate

At the holding point

19. What are the positions(in the order left to right) on the Boeing 737-400 IRS Mode Selector Unit (MSU)?

OFF STBY NAV ATT

OFF STBY ATT NAV

OFF STBY ALIGN NAV

OFF ALIGN NAV ATT

20. When the Boeing B737-400 FMS is being initialized prior to flight, the system?

Rejects initial latitude error, but it will accept longitude error

Rejects initial latitude or longitude error

Cannot detect input errors, and accepts whatever is put in

Rejects initial longitude error, but it will accept latitude error

21. In what formats can created waypoints be entered into the scratch pad of the B737-400 FMS?

Place Bearing/Distance, Place Bearing/Place Bearing, Along-Track Displacement, Latitude and Longitude

Place Bearing/Distance, Place Bearing/Place Bearing, Across-Track Displacement, Latitude and Longitude

Place Bearing/Distance, Place Distance/Place Distance, Along-Track Displacement, Latitude and Longitude

Place, Place Bearing/Distance, Along-Track Displacement, Latitude and Longitude

22. How much time is required to align an Inertial Reference System?

15 minutes

1 minute

10 minute

5 minute

23. The functions of the Boeing 737-400 FMS include?

Manual navigation & automatic performance management

Automatic navigation & automatic performance management

Automatic navigation & manual performance management

Manual navigation & manual performance management

24. What do you call a system of gyros and accelerometers that is fixed to the aircraft?

Laser

Stabilised

Strapdown

Fixed

25. By what means in an accurate vertical maintained using a pendulous system, an aircraft Inertial platform Incorporates a device?

Without damping and a period of 84.4 SEC

With damping and a period of 84.4 MIN

Without damping and period of 84.4 MIN

With damping and a period of 84.4 SEC

26. For how long does the data in the FMS database remain valid?

56 days

28 days

Variable

One week

27. Which of the following statements is true of a Ring Laser Gyro?

If doesn't suffer from 'lock in' and is unaffected by the earth's gravitational force

It is fixed to true north and is quick to erect

It is not necessarily fixed to true north but takes along time to erect

It is not necessarily fixed to true north and is quick to erect

28. What is the purpose of the plezo-electric motor in an IRS system?

Shake

Vibrate

Dither

Shudder

29. What are, in order of highest priority followed by lowest, the two levels of message produced by the CDU of the B737-400 Electronic Flight Instrument System?

Urgent and Routine

Warning nd Advisory

Warning and Caution

Caution and Advisory

30. How does the FMS calculate groundspeed?

Input from ADC of TAS and wind velocity

Input of heading from either the IRS or gyro compass, TAS from ADC and wind velocity from selected metrological data

Input from DME with change of range integrated with respect to time

Input from IRS

31. What does INS need for wind calculation?

EAS

Heading

TAS

Mach Number

32. How long does it take to align an IRS (Laser Ring Gyros)?

1 minute

5 minute

10 minutes

15 minutes

33. What do the sensors of an INS measure?

The horizontal component of the earth's rotation

Velocity

Acceleration

Precession

34. Gyro - compassing in an INS?

Is possible in flight as the gyros can differentiate between acceleration due to aircraft movement and initial alignment errors.

Is not possible in flight as the gyros can differentiate between acceleration due to aircraft movement and Initial alignment errors.

It is not possible in flight because the gyros cannot differentiate between acceleration due to aircraft movement and initial alignment errors.

d. Is possible in flight as he gyros cannot differentiate between acceleration due to aircraft movement and Initial alignment error.

35. Alignment of INS and IRS equipments can take place in which of the following modes?

NAV and ALIGN

ALING and ATT

ATT and ALIGN

ALING only

36.
Which Cyan symbol below represents an off-route waypoint?

D

B

C

A

37. The sensors of an INS measure?

Acceleration

TAS

Velocity

Position

38. The platform of an inertial navigation system (INS) is maintained at right angles to the local vertical by applying corrections to counter the effects of?

Movement in the yawing plane, secondary precession and pendulous oscillation

Vertical velocities, earth precession, centrifugal forces and transport drift

Aircraft manoeuvres, earth rotation, transport wander and coriolis

Gyroscopic Inertia, earth rotation and real drift

39. How does the FMS calculate groundspeed?

Input of heading from either the IRS or gyro compass, TAS from ADC and wind velocity from selected metrological data

Input from DME with change of range integrated with respect to time

Input from IRS

Input from ADC of TAS and wind velocity

40. If an IRS loses its position mid-flight it must?

Be turned OFF

Be selected to ALIGN and then to NAV

Have a new position inserted

Not be used in NAV mode

41. In which IRS mode does gyro-compassing take place?

NAV

ON

ATT

ALIGN

42. In an Inertial Navigation System (INS), Ground Speed (GS) is calculated?

By Integrating gyro precession in N/S and E/W directions respectively.

From TAS and WN from Air Data Computer (ADC)

By integrating measured acceleration

From TAS and WN from RNAV data

43. How is the FMC position produced?

Half way between the IRS and radio navigation positions

Computer generated from the radio navigation positions

The average of the IRS position

Computer generated from the IRS and radio navigation positions

44. In what way does IRS differ from INS?

Does not experience Schuler errors as accelerometers are strapped down.

Has a shorter spin-up time and suffers from laser lock

Does not need to correct for coriolis and central acceleration

Has a longer spin-up time and is not affected by vertical acceleration due to gravity.

45. An aircraft equipped with an Inertial Navigation System (INS) files with INS 1 coupled with autopilot 1. Both Inertial navigation systems are navigating from waypoint A to B. The inertial systems 'Central Display Units (CDU) show: XTK on INS 1 = 12 L XTK on INS 2 = 0(XTK = cross track) What can be deducted from this information?

The autopilot is unserviceable in NAV mode

At least one of the Inertial navigation systems is drifting

Only Inertial navigation system No.2 is drifting

Only Inertial navigation system no. 1 drifting

46. On a triple-fit IRS system, present positions on the CDU?

Will only differ if one IRS has been decoupled due to a detected malfunction.

Will not differ as the information is averaged

Are likely to differ as the information comes from different sources

Will only differ if an Initial input error of aircraft position has been made

47. In what form are positions entered in all INS systems?

Hexadecimals

Geographic coordinates

Waypoint names

Ranges and bearings

48. In order to maintain an accurate vertical using a pendulous system, an aircraft Inertial platform incorporates a device?

With damping and a period of 48.4 SEC

With damping and a period of 84.4 MIN

With damping and a period of 48.4 MIN

With damping and a period of 84.4 SEC.

49. In what modes is the Weather Radar Display available on EFIS EHSI?

MAP, EXPVOR/ILS, EXP NAV

MAP,PLAN, FULL VOR/ILS

MAP, FULLVOR/ILS, FULL NAV

MAP, PLAN, EXP VOR/ILS

50. In an Inertial Navigation System (INS), what is the output of the first stage North/South integrator?

Longitude

Velocity along the local meridian

Groundspeed

Change of latitude

Question Bank

Questions for INS/IRS/FMS