Q1. You intend to overfly a mountain range. The recommended minimum flight altitude is, according to the aviation chart, 15000 FT/AMSL. The air mass that you will fly through is on average 15°C warmer than the standard atmosphere. The altimeter is set to QNH (1023 hPa). At what altimeter reading will you effectively be at the recommended minimum flight altitude?
14100 FT.
Q2. You are flying at FL 130, and your true altitude is 12000 FT. What is the temperature deviation from that of the standard atmosphere at FL 130 (QNH 1013,2 hPa) ?
ISA -20°C
Q3. The QNH of an airport at sea level is 983 hPa and the temperature deviation from ISA is -15°C below FL 100. What is the true altitude of FL 100?
8590 FT.
Q4. You plan a flight over a mountain range at a true altitude of 15000 FT/AMSL. The air is on an average 15°C colder than ISA, the pressure at sea level is 1003 hPa. What indication must the altimeter (setting 1013.2 hPa) read?
16170 FT.
Q5. Which of the following conditions would cause the altimeter to indicate a lower altitude than that actually flown ?
Air temperature higher than standard
Q6. An aircraft flying at FL 100 from Marseille (QNH 1012 hPa) to Palma de Mallorca (QNH 1006 hPa) experiences no change to true altitude. The reason for this is that :
the air at Palma de Mallorca is warmer than that at Marseille
Q7. During a flight over the sea at FL 100 from Marseille (QNH 1012 hPa) to Palma de Mallorca (QNH 1012 hPa), the true altitude is constantly increasing. What action, if any, should be taken ?
None, the reason for the change is that the air around Palma is warmer than the air around Marseille
Q8. During a flight over the sea at FL 100 from Marseille (QNH 1016 hPa) to Palma de Mallorca (QNH 1016 hPa), the true altitude is constantly decreasing. What is the probable reason for this ?
The air at Marseille is warmer than that at Palma de Mallorca
Q9. During a flight over the sea at FL 135, the true altitude is 13500 feet; local QNH is 1019 hPa. What information, if any, can be gained about the air mass in which the aircraft is flying?
It is colder than ISA
Q10. An aircraft is flying over the sea at FL 90; the true altitude is 9100 feet; local QNH is unknown. What assumption, if any, can be made about the air mass in which the aircraft is flying ?
There is insufficient information to make any assumption
Q11. An aircraft is flying over the sea at FL 100, with a true altitude of 10000 feet; local QNH is 1003 hPa. What assumption, if any, can be made about the air mass in which the aircraft is flying ?
It is warmer than ISA
Q12. 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
Q13. 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
Q14. 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
Q15. 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
Q16. 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
Q17. (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.
Q18. 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
Q19. 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
Q20. The pressure altitude is equal to the true altitude if
standard atmospheric conditions occur
Q21. The altimeter is connected to:
Q22. In spite of a constant altimeter reading your aircraft is loosing altitude. This could be caused by:
Flying towards low pressure.
Q23. 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
Q24. What condition would cause that your altimeter is indicating lower than actually flown?
Temperature higher than standard
Q25. 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
Q26. 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
Q27. You are flying at FL 100 in an airmass which is 15°C colder than ISA, local QNH 983. True altitude?
8590 ft
Q28. 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
Q29. While mountain flying on a warm summer day under high pressure conditions, you circle a mountain of known height at peak elevation. Comparing to the indication of your altimeter, the peak elevation will therefore be….
higher
Q30. You are cruising at FL 200, OAT -40°C, sea level pressure 1033 hPa. Calculate the true altitude:
19340 ft
Q31. You intend to overfly a mountain ridge at an altitude of 15000 ft AMSL. The average air temperature is 15°C lower than ISA, the sea level pressure 1003 hPa. Which altimeter indication (standard setting) is needed?
16170 ft
Q32. You intend to overfly a mountain ridge. The recommended minimum altitude for overflight according to your ICAO chart is 12000 ft AMSL. The average air temperature is 10°C higher than ISA, your altimeter is set to the local QNH of 1023 hPa. Which altimeter indication is needed to maintain the recommended minimum altitude?
11520 ft
Q33. You have landed at an airport, local QNH 993 hPa. After landing, you notice, that your altimeter subscale is still set to 1013,2 hPa. Your altimeter indicates 1200 ft. What is the airport elevation?
660 ft AMSL
Q34. You are cruising at FL 160 at an OAT of -27°C. The sea level pressure is 1003 hPa. Your true altitude therefore is…
15090 ft
Q35. When the altimeter indicated 0 (zero) ft when the aircraft was parked for the night, and 1000 ft the following morning, this shows that:
the barometric pressure has decreased by approx. 37 hPa