Results
Q1. Assume that an aircraft is flying in the northern hemisphere at the 500 hPa pressure surface on a heading of 270 degrees. Which of the following statements is correct?
If in this pressure surface the wind comes from the direction 360 degrees, then true altitude is increasing
Q2. You are flying in a unpressurised aircraft. You select the alternate static source which located within the cockpit. Your airspeed indicator and altimeter reading:
Correct answer is – Altimeter will over read, airspeed indicator will over read
Q3. In spite of a constant altimeter reading your aircraft is loosing altitude. This could be caused by:
Flying towards low pressure.
Q4. With a constant TAS, when pressure altitude decreases below the tropopause:
Correct answer is – Mach number decreases
Q5. The combined Machmeter / ASI is subject to the following errors:
Correct answer is – position, density, instrument, compressibility, manoeuvre induced
Q6. An aircraft flies at FL250. OAT -45°C. The QNH, given by a meteorological station with an elevation of 2,830 ft, is 1033 hPa. Calculate the clearance above a mountain ridge with an elevation of 20,410 ft.
Correct answer is – 4,200ft
Q7. If icing or debris causes a disturbance or blockage at the static pressure source, what will be the effect on the primary flight instruments?
Correct answer is – All pressure instruments will continue to indicate abnormally.
Q8. If an aircraft with two static ports, yawing towards the blocked port, the altitude indication will?
Correct answer is – Decrease.
Q9. An airplane is in steady cruise at flight level 290. The auto throttle maintains a constant Mach number. If the total temperature increases, the calibrated airspeed:
Correct answer is – remains constant
Q10. You are flying at FL 100 in an airmass which is 15°C colder than ISA, local QNH 983. True altitude?
8590 ft
Q11. Static pressure position error:
Correct answer is – is caused by disturbed airflow around the static ports
Q12. When climbing through an inversion at a constant Mach number?
Correct answer is – TAS increases.
Q13. If the static pressure line in an unpressurized aircraft becomes detached or leaks, the altimeter would __________,but the error__________.
Correct answer is – Read too low ; can not be rectified
Q14. *** If the choke in the VSI becomes partly blocked?
Correct answer is – The VSI indication will be too high when climbing or descending. choke is designed to create differential pressure change .if choke is partially blocked the difference created will be more so indicated rate of climb/descend will be more.
Q15. When descending through an isothermal layer at a constant Calibrated Airspeed (CAS), the True Airspeed (TAS) will:
Correct answer is – Decrease.
Q16. The correct action is to be taken when the static vent blocks on an unpressurised aircraft to stablize the correct static pressure.
Correct answer is – Use the standby static source.
Q17. If icing or debris cause pressure disturbances at the static source, the effect will be?
Correct answer is – Increased position error.
Q18. When an aircraft is descending through an isothermal layer while maintaining a constant Mach number, how will the Calibrated Airspeed (CAS) change?
Correct answer is – TAS remains constant.
Q19. If the static pipe becomes completely blocked during flight, what will be the effect on the pitot-static instruments during climb ?
Correct answer is – The altimeter and VSI will freeze, and the ASI will give erroneous readings.
Q20. During a climb, the total pressure probe of the airspeed indicator becomes blocked; if the pilot maintains a constant IAS, the TAS:
Correct answer is – decreases until reaching the stall speed
Q21. If the casing of a Vertical Speed Indicator (VSI) in a pressurized aircraft develops a leak, what will be the effect on the instrument indication?
Correct answer is – VSI indications will be too high when climbing and too low when descending.
Q22. An aircraft takes off from X with an altimeter setting of QNH 1013.25 hPa. Climbs to 20000′ and goes to Y. Height of the aircraft over Y is 22600. Find the QFE of Y. Use 1 hPa = 30 feet
Correct answer is – 1100
Q23. When climbing at a constant CAS in standard atmosphere:
Correct answer is – TAS and Mach number increases
Q24. The pressure altitude is equal to the true altitude if
standard atmospheric conditions occur
Q25. True altitude is obtained from……………. on board an aircraft?
Correct answer is – Pressure altitude.
Q26. *** If an aircraft is equipped with two altimeter which is compensated for position error and another altimeter which is not ; and all other factors being equal ______
Correct answer is – At high speed, the non-compensated altimeter will indicate a higher altitude
Q27. What is the main difference between the VSI and IVSI?
Correct answer is – The IVSI uses accelerometers that respond to pitch change
Q28. How will Mach meter indication respond if an aircraft passes through a cold front when flying at constant CAS and altitude?
Correct answer is – Remain constant.
Q29. At FL300 with a ISA deviation of +10, the true airspeed when flying at M 0.78 is:
Correct answer is – 460 kt
Q30. # The response rate of a VSI can be improved by fitting a?
Correct answer is – Accelerometer system.
Q31. An aeroplane is in steady cruise at flight level 270. The auto-throttle maintains a constant calibrated airspeed. If the static air temperature increases, the Mach number:
Correct answer is – remains constant
Q32. An aeroplane is in a steady climb. The auto throttle maintains a constant Mach number. If the total temperature remains constant, the calibrated airspeed:
Correct answer is – decreases
Q33. Because the VSI measures rates of change of static pressure and not actual values of static pressure, position error:
Correct answer is – may cause errors in the VSI during the take-off run, it measure rate of change in pressure — so when static pressure is changing VSI will show error . during take off run aircraft is accelerating so static pressure will fluctuate and vsi will show error.
Q34. You are flying at FL 160. Outside air temperature is -27°C, and the pressure at sea level is 1003 hPa. What is the true altitude?
15090 feet
Q35. An aeroplane is flying at FL300 with a TAS of 470 kt in standard conditions. The Mach number is:
Correct answer is – 0.8
Q36. The response time of a vertical speed detector may be increased by adding a:
Correct answer is – correction based on an accelerometer sensor
Q37. You are planning to fly across a mountain range. The chart recommends a minimum altitude of 12000 feet above mean sea level. The air mass you will be flying through is an average 10°C warmer than ISA. Your altimeter is set to 1023 hPa (QNH of a nearby airport at nearly sea level). What altitude will the altimeter show when you have reached the recommended minimum altitude?
11520 feet
Q38. An aircraft has one altimeter set to QFE and one to aerodrome QNH 1000 hPa. If the airfield elevation is 300 ft, immediately before take-off the altimeter with QFE set will read __________ and the other __________. If the QFE altimeter is set to 1013 when passing through the transition altitude 3000 ft, it will read __________________ (Assume 1 hPa = 30 ft).
Correct answer is – zero; 300 ft; 3390 ft ; transition altitude is always measured from local MSL.
Q39. You are flying at FL 200. Outside air temperature is -40°C, and the pressure at sea level is 1033 hPa. What is the true altitude?
19340 feet
Q40. If the static pipe becomes completely blocked during flight, what will be the effect on the pitot-static instruments?
Correct answer is – The VSI indication will eventually return and settle at zero.
Q41. ## The vertical speed indicator indications may be in error for some seconds after starting or finishing a climb or descent. The error is a result of :
Correct answer is – a combination of time lag and manoeuvre induced errors
Q42. The relationship between TAS, Mach number (M No) and local speed of sound (LSS):
Correct answer is – TAS = M No × LSS
Q43. During flight in a pressurized aircraft, the pressure feed line to the barometric altimeter becomes detached from the rear of the instrument. As a result, the altimeter is no longer connected to the static pressure source. In this situation, the altimeter will __________.
Correct answer is – Read cabin altitude. pressure pipe got de-attached means it will take from the cabin. if aircraft is non pressurised then cabin pressure will be slightly lower, and altimeter will Overread. if aircraft is pressurised then cabin pressure will be higher and it will Underread. the best option – Reads cabin altitude. i.e. altitude reading will be according to cabin pressure.
Q44. An airplane is cruising at FL220. The auto-throttle maintains a constant CAS. If the OAT/total temperature decreases, the Mach number:
Correct answer is – remains constant
Q45. The total pressure probe has become blocked. What is the effect on the VSI?
Correct answer is – the VSI will operate normally
Q46. The primary factor which makes the servo-assisted altimeter more accurate than the simple pressure altimeter is the use of?
Correct answer is – An induction pick-off device.
Q47. An aircraft is flying through the Alps on a very cold winter’s day. The regional QNH is 1013 hPa. During the flight, you circle around a mountain at an altitude of its summit. What reading will the aneroid altimeter give, compared to the elevation of the summit?
A higher altitude than the elevation of the summit
Q48. When climbing at a constant Mach number below the tropopause, in ISA conditions, the Calibrated Airspeed (CAS) will:
Correct answer is – Decrease
Q49. The errors to which the Machmeter is subject are:
Correct answer is – instrument error, position error and manoeuvre induced error
Q50. An aircraft is flying at FL200. OAT 0 °C. When the actual air pressure on an airfield at MSL is placed in the subscale of the altimeter the indicated altitude is 19,300 ft. Calculate the aircraft’s true altitude.
Correct answer is – 21,200ft
Q51. A servo altimeter is ……………. than a conventional one, because…………….?
Correct answer is – More accurate , electrical pick-off coils.
Q52. *** What would happen if the static pipe became detached from the back of a Mach meter in a pressurized aircraft at a high altitude?
Correct answer is – Under read.
Q53. During pre-flight preparation, a pilot notices that the QNH has increased from 1013 hPa to 1022 hPa. Before take-off, the pilot resets the altimeter subscale to the new QNH value. The effect will be:
Correct answer is – Not affect field elevation.
Q54. Permissible limits of accuracy of the VSI are …… when …… within a temperature range of …… and …… outside this range.
Correct answer is – + 200 fpm, on the ground, -20°C to +50°C, +/- 300 fpm
Q55. When an aircraft is descending through an isothermal layer while maintaining a constant Calibrated Airspeed (CAS), how will the Mach number change?
Correct answer is – TAS decreases.
Q56. An aircraft, flying so that the altimeter indicates 2500ft with the current regional QNH set in the subscale, is flying towards an area of lower pressure. If the pilot fails to revise the subscale setting as the QNH changes, then the aircraft will:
Gradually descend
Q57. An aircraft takes off from X with the altimeter setting of QNH 1008. Climbs to 10000′ and goes to Y. QNH at Y is 990 hPa. The elevation of Y is 360ft. ______________ Use 1hPa=30ft Find: Height of aircraft
Correct answer is – 9100
Q58. An aircraft is flying through the Alps on a warm summer’s day. The weather is fine, and there is a high pressure system in the area. During the flight, a mountain is passed at an altitude of its summit. What reading will the aneroid altimeter give, compared to the summit’s elevation?
A lower altitude than the elevation of the summit
Q59. You fly over the sea at FL 90, TA 9100ft, QNH unknown. What can be assumpted ?
No assumption is possible, because the information is not sufficient
Q60. What is QNH?
Correct answer is – Ambient pressure at msl.
Q61. If the static vent becomes blocked during a climb:
Correct answer is – the VSI will return to zero
Q62. When you have EAS and air density, you can determine:
Correct answer is – TAS
Q63. While mountain flying on a cold winter day, under fair weather conditions (QNH 1013 hPa), you circle a mountain of known height at peak elevation. Comparing to the elevation of the mountain, the aneroid altimeter of your aircraft will therefore indicate…..
a higher altitude
Q64. At FL450 with a ISA deviation of -10, the true airspeed when flying at M 0.80 is:
Correct answer is – 428 kt
Q65. If the aircraft is maintaining constant CAS and flight level and the OAT is decreasing:
Correct answer is – TAS decreases
Q66. What condition would cause that your altimeter is indicating lower than actually flown?
Temperature higher than standard
Q67. Given: An aircraft is flying at FL300 Mach number is 0.76 Indicated total air temperature is -19°C What is the OAT?
Correct answer is – Standard
Q68. An aircraft is flying at FL 180 on the northern hemisphere with a crosswind from the left. Which of the following is correct concerning its true altitude ?
It decreases
Q69. An aeroplane is cruising at FL 60 with a true airspeed (TAS) of 100 kt in standard atmospheric conditions. Which of the following statements are correct? 1) The TAS is approximately 10% higher than the IAS 2) The difference between the equivalent airspeed (EAS) and the calibrated airspeed (CAS) is negligible 3) The speed displayed on the airspeed indicator is a calibrated airspeed (CAS) if the position error and instrument error are zero
Correct answer is – 1, 2 and 3 are all correct
Q70. *** Considering the maximum operational Mach number (MMO) and the maximum operational speed (VMO), the captain of a pressurized aircraft begins his descent from a high flight level. In order to meet his scheduled time of arrival, he decides to use the maximum ground speed at any time of the descent. He will be limited:
Correct answer is – Initially by the MMO, then by the VMO below a certain flight level.
Q71. Aircraft flying from A to B Distance is 1000nm. QNH of A and B is 1014 and 990 hPa Respectively. There is a mountain in between (elevation 15000 feet) , find the minimum indicated altitude should be flown to keep clearance of at least1000 feet. _____ Use 1 HPa = 30 feet
Correct answer is – 16338 Feet
Q72. An airplane is in steady cruise at flight level 290. The auto throttle maintains a constant Mach number. If the total temperature decreases, the calibrated airspeed:
Correct answer is – remains constant
Q73. An aircraft takes off from X with an altimeter reading Zero. Climbs to 12000′ and goes to Y. Given: QNH of X = 1005 hPa, QFE of X = 999 hPa, QNH at Y = 1010 hPa, QFE of Y = 1003 hPa. Find Height of aircraft over Y. Use 1 hPa = 30 feet
Correct answer is – 12120
Q74. What is the advantage of having the VSI (Vertical Speed Indicator) dial graduated with logarithmic spacing rather than linear spacing?
Correct answer is – at low rates of climb or descent the pointer movement is much larger and so is more easily read
Q75. Which of the following cause air density to decrease?
Correct answer is – Increasing humidity, increasing altitude, increasing temperature.
Q76. In the IVSI, lag error:
Correct answer is – is overcome by using a special dashpot accelerometer assembly
Q77. When descending at constant CAS, the TAT and Mach meter indications should?
Correct answer is – Increase; decrease. Mach number decreases when descending with constant CAS. Temperature increases. LSS only depends on temperature so LSS increases
Q78. An aeroplane is in steady descent below the tropopause in the ISA. The auto-throttle maintains a constant calibrated airspeed. If the total temperature remains constant, the Mach number:
Correct answer is – Decreases.
Q79. If the pressure remains constant while the temperature increases, what will happen to the density of the air?
Correct answer is – Density will decrease, causing the CAS: TAS ratio to decrease.
Q80. A VSI indicates increasing ROD by?
Correct answer is – VSI needle moving downwards.
Q81. The position error of the static vent on which the altimeter is connected varies substantially with the:
Correct answer is – Mach number of the aircraft
Q82. An aircraft takes off from X with an altimeter setting of QNH 1020hPa. Climbs to 7000′ and goes to Y. Height of aircraft over Y is 5400 feet. The elevation of Y is 1300feet. QNH at Y is : Use 1 hPa = 30 feet
Correct answer is – 1010
Q83. The EAS is obtained from the IAS by correcting for the following errors: 1) Instrument 2) Position 3) Density 4) Compressibility The combination that regroups all of the correct statements is:
Correct answer is – 1, 2, 4
Q84. If the aircraft is maintaining constant CAS and flight level and the OAT is increasing:
Correct answer is – TAS increases
Q85. *If the static pipe becomes partly blocked?
Correct answer is – The VSI indication will be too low when descending.
Q86. An aeroplane is in steady climb. The auto-throttle maintains a constant calibrated airspeed. If the total temperature remains constant, the Mach number:
Correct answer is – Increases
Q87. (Newly added Question )– The following temperatures have been observed over a station at 1200 UTC. Assume the station is at MSL. Height in feet. Temperature in degrees C. 20000.-12 18000.-11 16000.-10 14000.-10 12000.-6 10000.-2 8000. +2 6000. +6 4000. +12 2000. +15 surface+15.
Assuming that the MSL pressure is 1013.25 hPa the true altitude of an aircraft would actually be higher than the indicated altitude.
Q88. *** What happens to mach meter indication in a constant RAS climb?
Correct answer is – Increases.
Q89. If the aircraft is maintaining a constant CAS and the pressure altitude is decreasing, the:
Correct answer is – EAS increases
Q90. ***When entering a steep turn, an IVSI is likely to show:
Correct answer is – a climb
Q91. *** In conditions of clear air turbulence:
Correct answer is – the IVSI is more sensitive
Q92. An aircraft taking off from an airfield with QNH set on the altimeter has both static vents blocked by ice. As the aircraft climbs away the altimeter will:
Correct answer is – read the airfield elevation
Q93. If an aircraft is climbed while maintaining a constant Mach number under ISA (International Standard Atmosphere) conditions, how will the Airspeed Indicator (ASI) respond?
Correct answer is – Decrease. use graph for Normal and then Isothermal. aircraft is climbing with constant mach ; TAS– first decreases and then constant ; CAS / IAS- decrease in both layer.
Q94. Aircraft takes off from P with altimeter reading 100 feet, Elevation of P: 300ft, QNH: 1015 hPa and landing at Q altimeter reading is 500 feet. QNH of Q 1022hPa, Find QFE of Q? — Use 1hPa=30ft
Correct answer is – 1024
Q95. The correct action is to be taken when the static vent blocks on an unpressurised aircraft to stablize the correct static pressure.
Correct answer is – Use the standby static source. you have the standby source then why will you break VSI glass ? Although breaking the Glass will stabilize your static pressure, when your system is using static line to fed the instrument.
Q96. An aeroplane is in steady descent. The auto-throttle maintains a constant calibrated airspeed. If the total temperature remains constant, the Mach number:
Correct answer is – Decreases
Q97. The Machmeter is subject to:
Correct answer is – Position/Instrument error
Q98. An aeroplane is cruising at FL 60 with a TAS of 100 kt in standard atmosphere. In these conditions: 1) the TAS is approximately 10% higher than the IAS 2) the difference between the EAS and the CAS is negligible 3) the speed displayed on the airspeed indicator is a CAS if the position error and instrument error are zero The combination regrouping all of the correct statements is:
Correct answer is – 1, 2, 3
Q99. At constant weight, regardless of altitude, an aircraft always lifts off at a constant:
Correct answer is – CAS
Q100. Your altimeter is blocked at 1000 hPa. You have to overfly a mountain (8000 ft) with a terrain clearance of at least 1500 ft. What will be your indicated altitude when the QNH of a nearby airport is 990 hPa and the temperature is 10C colder than ISA?
10150 ft