BARO – Air – DGCA Question Bank For Politics

#1. The hysteresis error of an altimeter varles substantially with the?

Time passed at a given altitude.

Mach number of the aircraft.

Aircraft altitude.

Static temperature.

#2. When flying from a sector of warm air into one of colder air, the altimeter will?

Under read.

Be just as correct as before.

Show the actual height above ground.

Over read.

#3. At sea level, on a typical servo altimeter, the tolerance in feet from indicated must?

+/-60 feet.

+/-75 feet.

+/-30 feet.

+/-70 feet.

#4. The altitude indicated on board an aircraft flying in an atmosphere where all the atmosphere layers below the aircraft are cold is?

Equal to the standard altitude.

Lower than the real altitude.

The same as the real altitude.

Higher than the real altitude.

#5. The purpose of the vibrating device of an altimeter is to?

Allow damping of the measurement in the unit.

Reduce the hysteresis effect.

Reduce the effect of friction in the linkages.

Inform the crew of a failure of the instrument

#6. The vertical speed indicator of an aircraft flying at a true airspeed of 100 kt, in a descent with a slope of 3 degrees, indicates?

-300 ft/min.

-150 ft/min.

-250 ft/min.

-500 ft/min.

#7. The altitude indicated on board an aircraft flying in an atmosphere where all atmosphere layers below the aircraft are warm is?

Equal to the standard altitude.

Higher than the real altitude.

The same as the real altitude.

Lower than the real altitude.

#8. The primary factor which makes the servo-assisted altimeter more accurate than the simple pressure altimeter is the use of?

A sub-scale logarithmic function.

An induction pick-off device.

More effective temperature compensating leaf springs.

Combination of counters/ pointers.

#9. What will happen to the altimeter reading in a right sideslip, if an aircraft has a static vent at each side of the fuselage, but the left one is blocked?

Over read.

Under read.

No change.

Depends on altitude.

#10. From what is true altitude derived?

Pressure altitude.

Density altitude

Temperature altitude.

Difference between total pressure and static pressure.

#11. What is QNH?

Amblent pressure at the airfield.

Sea level pressure based on ambient pressure at the airfield.

Sea level pressure.

Sea level pressure in the ISA.

#12. What is QNH?

Ambient pressure at msl.

The pressure to be set on the altimeter subscale to obtain an indication of zero on the runway.

The pressure to be set on the altimeter subscale to obtain a reading of the pressure altitude of the runway.

The pressure to be set on the altimeter subscale to obtain density altitude when on the runway.

#13. What is the true altitude of an aircraft if its altimeter indicated 16000 ft when the ambient temperature was - 30° C?

15200 ft.

15400 ft.

16200 ft.

16400 ft.

#14. What will happen to the indicated altitude if an aircraft in level flight passes into a warmer air mass?

Over indicate.

Under indicate.

Not change.

Remain constant only if above the tropopause.

#15. What is density altitude?

Pressure altitude corrected for ambient temperature.

True altitude.

Pressure altitude corrected for density changes.

True altitude corrected for density changes.

#16. What will happen if an aircraft has two altimeters, one of which is compensated for position error, whilst the other is not?

The ADC will compensate automatically, so both with read correctly.

one will under read close to the ground.

One will under read at high airspeeds.

one will over read at high airspeeds.

#17. Why are vibrators sometimes fitted in altimeters?

Overcome friction.

Overcome inertia.

Overcome hysteresis.

Reduce lag.

#18. What will happen to altimeter indication if an aircraft in level flight enters a cold front?

Over indication.

Under indication.

No change.

No change above the tropopause.

#19. A barometric altimeter comprises of ?

An aneroid capsule sensing static pressure.

An aneroid capsule sensing pilot pressure.

A differential capsule sensing pilot and static pressures.

A bellows sensing temperature and static pressures.

#20. If pressure altitude is 30000 ft, indicated TAT is - 10, mach number is 0.82, what is the density altitude?

31000 ft.

30472 ft.

30573 ft.

30674 ft.

#21. If QNH is 999 hpa, what is the pressure altitude at an elevation of 25000 ft?

25100 ft.

25200 ft.

25300 ft.

25400 ft.

#22. If pressure altitude is 22800 ft, at an elevation of 22000 ft, what is QNH?

985 hPa.

976 hPa.

1034 hPa.

1026 hPa.

#23. If field elevation is 4000 ft amsl and QNH is 900 mb, what is the pressure altitude?

7390

6390

610

5540

#24. If field elevation is 3500 ft amsl and QFE is 1020 mb, what is the pressure altitude?

210

-210

3710

3290

#25. If pressure altitude is 3700 ft amsl and QNH is 1000 mb, what is field elevation?

3310

3210

390

490

#26. Density altitude is?

The altitude at which the existing density would occur in the ISA.

The density at which the existing temperature would occur in the ISA.

The elevation at which the existing density would occur in the ISA.

The pressure altitude corrected for density deviation.

#27. The pressure altitude of the field can be found by?

Setting QNH on the altimeter subscale.

Setting QFE on the altimeter subscale.

Setting 1013 mb on the altimeter subscale.

From an ADC only.

#28. If field pressure altitude is 5000 ft amsl and OAT is 25°C, what is the density altitude?

5000+118(25-(15-(5x1.98)))=7348.2 ft.

5000-118(25-(15+(5x1.98)))= 4988.2 ft.

5000+118(25-(15-(5x1.98)))= 8551.8 ft.

5000-118(25+(15+(5x1.98)))= 10888.2 ft.

#29. If QFE is 1022 hPa what is the pressure altitude of the field?

270 ft amsl.

-270 ft amsl.

30660 ft amsl.

500 ft amsl.

#30. If QNH is 1000 hPa and field elevation is 4500 ft amsl, what is QFE?

850 hPa.

163 hPa.

-850 hPa.

900 hPa.

#31. Pressure altitude is?

The altitude above sea level.

The altimeter indication when QFE is set on the sub-scale.

The altimeter indication when QNH is set on the subscale.

The altimeter indication when 1013.25 hPa is set on the sub-scale.

#32. Which of the following cause air density to decrease?

Increasing humidity, increasing altitude, increasing temperature.

Increasing humidity, increasing altitude, decreasing temperature.

Increasing humidity, decreasing altitude, increasing temperature.

Decreasing humidity, increasing altitude, decreasing temperature.

#33. If QNH changes from 1013 hPa to 1022 hPa this will?

Increase field elevation.

Decrease field elevation.

Not affect field elevation.

Decrease QFE.

#34. If QFE changes from 1013 hPa to 1022 hPa will?

Increase field elevation.

Not affect QNH.

Increase QNH.

Decrease QNH.

#35. As pressure altitude increases?

Temperature decreases.

Temperature increases.

Temperature increases then remains constant.

Temperature decreases then remains constant.

#36. At a fixed pressure altitude an increase in temperature will?

Decrease density but increase density altitude.

Decrease density altitude.

Not affect density altitude.

Increase density but decrease density altitude.

#37. What will happen to the altimeter reading in a right sideslip, If an aircraft has a static vent at each side of the fuselage, but the right one is blocked?

Over read.

Under read.

No change.

Depends on altitude.

#38. What will a cabin altimeter read with QFE set.

The same as with QNH set.

Height AGL.

Height above sea level.

Field elevation when on the runway.

#39. The altimeter of an aircraft with a static pressure source on each side of the fuselage will ...... if one becomes blocked?

Over read when side slipping

Over read when side slipping towards the blocked source.

Over read when side slipping towards the clear source.

Under read when side slipping.

#40. A servo altimeter is ...... it employs an electrical pick-off?

More accurate because.......

Less accurate because........

Less reliable because......

More reliable because......

#41. What will happen to the altimeter reading if an aircraft flying at a fixed heading meets a colder air mass?

Read less than true altitude.

#42. What is the true altitude of an aircraft flying at 16000 ft indicated altitude with an OAT of -16 degrees C?

13200 ft

14200 ft

16050 ft

#43. From where does the ADC obtain altitude data?

Radio Altimeter.

OAT sources

Barometric altitude source.

Dynamic minus total pressure.

#44. True altitude is obtained from ....... on board an aircraft?

Density altitude.

Temperature altitude.

Pressure altitude

International standard altitude.

#45. What is density altitude?

Pressure altitude corrected for density.

Temperature altitude corrected for density.

Pressure altitude corrected for temperature.

Temperature altitude corrected for pressure.

#46. How will altimeter readings be affected if the layers of air below an aircraft are colder than the standard temperature?

Read true altitude, only the air above matters.

Read zero

Read higher than true

Read lower than true.

#47. Read true altitude, only the air above matters.

Read true altitude, only the air above matters.

Readings will freeze.

Read higher than true.

Read lower than true.

#48. One definition of pressure altitude is?

Altitude indication with QFE set.

Pressure at that height in the standard atmosphere

Altitude Indication with 1013.25 hPa set.

Altitude indication with QNH set.

#49. If icing or debris cause pressure disturbances at the static source, the effect will be?

Increased compressibility error.

Increased instrument error.

Decreased altitude indication.

Increased position error.

#50. If an aircraft flying at constant height over a level surface meets a hotter air mass, the altimeter will?

Indicate higher than true.

Indicate lower than true.

Indicate randomly varying altitude.

Indicate zero.

#51. Servo altimeters are more accurate because?

They employ a logarithmic scale.

They sense pressure changes more accurately.

They employ a vibrator to minimise friction errors.

They employ electromagnetic pick-offs.

#52. The ADC obtains its altitude data from?

A barometric altimeter.

A radio altimeter.

The TAT and OAT probes

A barometric static pressure sensor similar to a servo altimeter.

#53. A servo altimeter is ..... than a conventional one, because ...... ?

More accurate electrical servos.

More accurate electrical pick-off coils.

Less accurate electric servos.

Less accurate Electrical pick-off colls.

#54. In a barometric altimeter ....... is fed into the capsule and ...... is fed into the case?

Static pressure dynamic pressure.

Vacuum static pressure.

Dynamic pressure vacuum.

Total pressure static pressure.

#55. If the static pressure source in an un- pressurised aircraft became blocked the altimeter would ...... but might be rectified by ........ ?

Read zero break the altimeter glass.

Read zero open the windows.

Freeze break the altimeter glass.

Freeze open the windows.

#56. If the pilot source becomes blocked the barometric altimeter will?

Freeze.

Read zero.

Read altitude at which it blocked.

Be unaffected.

#57. If the static vent becomes partly blocked in a descent the indications will?

Be too high when descending but correct when at constant altitude.

Be too high when descending but correct when at constant height.

Be too low when descending but correct when at constant altitude.

Be too low when descending but correct when at constant height.

#58. A vibrator is sometimes fitted in an altimeter to?

Overcome gauge parallax error.

Reduce instrument errors.

Reduce sensing errors.

To act as an aural warning.

#59. In a banked turn a barometric altimeter using a single static source?

will over indicate.

will under indicate.

might over or under indicate, depending on the position of the static source.

Will read zero.

#60. True altitude is shown from ....... on board an aircraft?

Density altitude.

Pressure altitude.

Radio altitude.

Temperature altitude.

#61. Density altitude is?

Temperature altitude corrected for density.

Temperature altitude corrected for pressure.

Pressure altitude corrected for temperature.

Pressure altitude corrected for density.

#62. If an aircraft has two altimeters, only one of which is corrected for position error?

ATC transponder replies will be inaccurate.

At high altitude and high speed the non-corrected altimeter will over indicate.

At high altitude and high speed the non-corrected altimeter will under indicate.

At low altitude and low speed the corrected altimeter will over indicate.

#63. Some altimeters employ vibrators in order to ?

Minimise hysteresis.

Minimise inaccuracies due to internal friction.

Provide audible warning of low altitudes.

Eliminate instrument error.

#64. If an aircraft with two static ports, sideslips towards the blocked port, the altitude indication will?

Increase.

Decrease.

Remain unchanged.

Increase or decrease depending on sideslip angle.

#65. If an aircraft with two static ports, sideslips towards the unblocked port, the altitude indication will?

Increase.

Decrease.

Remain unchanged.

Increase or decrease depending on sideslip angle.

#66. Barometric altimeter readings can become erratic during landing because?

Static ports can become blocked by debris.

Static pressure is changed by ground effect.

The air is warmer close to the ground so dynamic pressure changes.

Static ports become shielded by other parts of the aircraft at high angles of attack.

#67. What type of pressure sensor is employed in a barometric altimeter?

Aneroid capsule.

Differential capsule.

Bellows.

Bourden tube

#68. If the glass of a barometric altimeter in a pressurised aircraft becomes cracked and the static ports become blocked , the altimeter will?

Over read.

Under read.

Read zero continuously

Read cabin altitude.

#69. If the pressure feed line to a barometric altimeter becomes detached from the back of the instrument in flight the instrument will?

Read zero continuously.

Read cabin altitude.

Over read.

Under read.

Dgca Question Bank For Pilots

Results

#1. The hysteresis error of an altimeter varles substantially with the?

#2. When flying from a sector of warm air into one of colder air, the altimeter will?

#3. At sea level, on a typical servo altimeter, the tolerance in feet from indicated must?

#4. The altitude indicated on board an aircraft flying in an atmosphere where all the atmosphere layers below the aircraft are cold is?

#5. The purpose of the vibrating device of an altimeter is to?

#6. The vertical speed indicator of an aircraft flying at a true airspeed of 100 kt, in a descent with a slope of 3 degrees, indicates?

#7. The altitude indicated on board an aircraft flying in an atmosphere where all atmosphere layers below the aircraft are warm is?

#8. The primary factor which makes the servo-assisted altimeter more accurate than the simple pressure altimeter is the use of?

#9. What will happen to the altimeter reading in a right sideslip, if an aircraft has a static vent at each side of the fuselage, but the left one is blocked?

#10. From what is true altitude derived?

#11. What is QNH?

#12. What is QNH?

#13. What is the true altitude of an aircraft if its altimeter indicated 16000 ft when the ambient temperature was - 30° C?

#14. What will happen to the indicated altitude if an aircraft in level flight passes into a warmer air mass?

#15. What is density altitude?

#16. What will happen if an aircraft has two altimeters, one of which is compensated for position error, whilst the other is not?

#17. Why are vibrators sometimes fitted in altimeters?

#18. What will happen to altimeter indication if an aircraft in level flight enters a cold front?

#19. A barometric altimeter comprises of ?

#20. If pressure altitude is 30000 ft, indicated TAT is - 10, mach number is 0.82, what is the density altitude?

#21. If QNH is 999 hpa, what is the pressure altitude at an elevation of 25000 ft?

#22. If pressure altitude is 22800 ft, at an elevation of 22000 ft, what is QNH?

#23. If field elevation is 4000 ft amsl and QNH is 900 mb, what is the pressure altitude?

#24. If field elevation is 3500 ft amsl and QFE is 1020 mb, what is the pressure altitude?

#25. If pressure altitude is 3700 ft amsl and QNH is 1000 mb, what is field elevation?

#26. Density altitude is?

#27. The pressure altitude of the field can be found by?

#28. If field pressure altitude is 5000 ft amsl and OAT is 25°C, what is the density altitude?

#29. If QFE is 1022 hPa what is the pressure altitude of the field?

#30. If QNH is 1000 hPa and field elevation is 4500 ft amsl, what is QFE?

#31. Pressure altitude is?

#32. Which of the following cause air density to decrease?

#33. If QNH changes from 1013 hPa to 1022 hPa this will?

#34. If QFE changes from 1013 hPa to 1022 hPa will?

#35. As pressure altitude increases?

#36. At a fixed pressure altitude an increase in temperature will?

#37. What will happen to the altimeter reading in a right sideslip, If an aircraft has a static vent at each side of the fuselage, but the right one is blocked?

#38. What will a cabin altimeter read with QFE set.

#39. The altimeter of an aircraft with a static pressure source on each side of the fuselage will ...... if one becomes blocked?

#40. A servo altimeter is ...... it employs an electrical pick-off?

#41. What will happen to the altimeter reading if an aircraft flying at a fixed heading meets a colder air mass?

#42. What is the true altitude of an aircraft flying at 16000 ft indicated altitude with an OAT of -16 degrees C?

#43. From where does the ADC obtain altitude data?

#44. True altitude is obtained from ....... on board an aircraft?

#45. What is density altitude?

#46. How will altimeter readings be affected if the layers of air below an aircraft are colder than the standard temperature?

#47. Read true altitude, only the air above matters.

#48. One definition of pressure altitude is?

#49. If icing or debris cause pressure disturbances at the static source, the effect will be?

#50. If an aircraft flying at constant height over a level surface meets a hotter air mass, the altimeter will?

#51. Servo altimeters are more accurate because?

#52. The ADC obtains its altitude data from?

#53. A servo altimeter is ..... than a conventional one, because ...... ?

#54. In a barometric altimeter ....... is fed into the capsule and ...... is fed into the case?

#55. If the static pressure source in an un- pressurised aircraft became blocked the altimeter would ...... but might be rectified by ........ ?

#56. If the pilot source becomes blocked the barometric altimeter will?

#57. If the static vent becomes partly blocked in a descent the indications will?

#58. A vibrator is sometimes fitted in an altimeter to?

#59. In a banked turn a barometric altimeter using a single static source?

#60. True altitude is shown from ....... on board an aircraft?

#61. Density altitude is?

#62. If an aircraft has two altimeters, only one of which is corrected for position error?

#63. Some altimeters employ vibrators in order to ?

#64. If an aircraft with two static ports, sideslips towards the blocked port, the altitude indication will?

#65. If an aircraft with two static ports, sideslips towards the unblocked port, the altitude indication will?

#66. Barometric altimeter readings can become erratic during landing because?

#67. What type of pressure sensor is employed in a barometric altimeter?

#68. If the glass of a barometric altimeter in a pressurised aircraft becomes cracked and the static ports become blocked , the altimeter will?

#69. If the pressure feed line to a barometric altimeter becomes detached from the back of the instrument in flight the instrument will?