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#1. The 850 hPa pressure level can vary in height. In temperate regions which of the following average heights is applicable?
Refer the chart
850 hpa is 5000 pressure altitude or fl50
#2. Which constant pressure altitude chart is standard for 18,289 FT pressure level (FL 180)?
Refer the chart
500 hpa is 18000 pressure altitude
#3. If you are planning a flight at FL 170, which of these upper wind and temperature charts would be nearest your flight level?
Refer the chart
500 hpa is 18000 pressure altitude
which is close to 17000
#4. Which constant pressure altitude chart is standard for a 38,662 FT pressure level (FL 390)?
Refer the chart
200 hpa is 38000 pressure altitude
#5. The station pressure used in surface weather charts is
Qff is the barometric pressure at the surface reduced to MSL using the observed temperature at the surface and it’s corresponding pressure lapse rate only used for charts
#6. Half the mass of the atmosphere is found in the first
#7. A 500 hPa pressure level can vary in height. In temperate regions which of the following average heights is applicable?
Refer the chart
500 hpa is 18000 feet
#8. Which constant pressure altitude chart is standard for a 4781 FT pressure level (FL50)?
850 hpa is 5000 feet
#9. The QNH at an airfield located 200 metres above sea level is 1022 hPa. The air temperature is not available. What is the QFF?
temperature is required
#10. A 700 hPa pressure level can vary in height. In temperate regions which of the following average heights is applicable?
700 hpa is 10000 feet
#11. When planning a flight at FL 60, which upper wind and temperature chart would be nearest your flight level?
850 hpa is 5000 feet
closest to 6000 feet
#12. The QFF at an airfield located 400 metres above sea level is 1016 hPa. The air temperature is 10°C higher than a standard atmosphere. What is the QNH?
#13. Which of the following is true concerning atmospheric pressure?
#14. The upper wind and temperature chart of 250 hPa corresponds, in a standard atmosphere, to about
since 250 hpa is halfway between 300 hpa and 200 hpa , altitude should be selected between 30000 and 38000
#15. What positions are connected by isobars on the surface weather chart?
Isobars are line joining places of the same atmospheric pressure
#16. How would you characterise an air temperature of -30°C at the 300 hPa level over Western Europe?
as per table pressure altitude is 30000 feet
As per isa 30000 should have
(30x-2*) plus 15= —45°c as temperature
(-2 being lapse rate)*
but temp is -30°
hence it is HIGH
#17. The QFF at an airfield in California located 69 meters below sea level is 1030 hPa. The air temperature is 10°C lower than a standard atmosphere. What is the QNH?
#18. What is the approximate vertical interval which is equal to a pressure change of 1 hPa at an altitude of 5500m?
5500 metre is 18000 feet
closest is 20000 feet
#19. The greater the pressure gradient the
Pressure gradient is the horizontal rate of change of pressure perpendicular to be isobars directed from high to low pressure it is steep or weak according to the isobars are close or far apart it is said to be steep isobars are closely packed
closer the isobars stronger the winds as wind tend to flow towards low pressure area
#20. When planning a flight at FL 110, which upper wind and temperature chart would be nearest your flight level?
As per the chart
700 hpa is 10000 feet
closest
#21. The QNH at an airfield in California located 69 meters below sea level is 1018 hPa. The air temperature is 10°C higher than a standard atmosphere. What is the QFF?
#22. The QNH at an airfield located 0 meters above sea level is 1022 hPa. The air temperature is not available. What is the QFF?
#23. In what hPa range is an upper weather chart for FL 340 situated?
since 250 hpa is halfway between 300 hpa and 200 hpa , altitude should be selected between 30000 and 38000
#24. If you are flying at FL 100 in an air mass that is 10°C warmer than a standard atmosphere, what is the outside temperature likely to be?
Lapse rate in isa -2°C per 1000 feet of climb
And temperature is 15 ° C at msl
climbing 10000 feet we reduce -2°C every 1000 feet
hence temperature lost is -20°C
now add this to 15° C( temperature at msl)
result is -5°C
add 10°c.
We get 5°c
#25. In the troposphere the decrease of pressure per 100 m increase in height
The air in the lower layers of the atmosphere is compressed by the weight of the air above it. Consequently, air is denser, and atmospheric pressure is greater, at the Earth’s surface than at altitude
#26. The QFF at an airfield located 400 meters above sea level is 1016 hPa. The air temperature is 10°C lower than a standard atmosphere. What is the QNH?
#27. Isobars on a surface chart are lines of equal
QFF is The value of pressure reduced to MSL in accordance with isothermal conditions.
Isobars are line joining places of the same atmospheric pressure (usually MSL pressure QFF).
#28. A 200 hPa pressure altitude level can vary in height. In temperate regions which of the following average heights is applicable?
200 hpa is 39000 feet
#29. If you are planning a flight at FL 290, which of these upper wind and temperature charts would be nearest your flight level?
300 hpa is 30000 feet
closest is 300 hpa
#30. A 300 hPa pressure level can vary in height. In temperate regions which of the following average heights is applicable?
#31. The QNH at an airfield located 200 metres above sea level is 1009 hPa. The air temperature is 10°C lower than a standard atmosphere. What is the QFF?
#32. Which constant pressure altitude chart is standard for a 30,065 FT pressure level (FL 300)?
300 hpa is 30000 feet
#33. Which constant pressure altitude chart is standard for a 9,882 FT pressure level (FL 100)?
Refer the chart
700 hpa is 10000 feet or fl100
#34. The isobars drawn on a surface weather chart represent lines of equal pressure
A line joining places of the same atmospheric pressure (usually MSL pressure QFF).
#35. If the pressure surfaces bulge upwards in all levels then the pressure system is a
Pressure level will bulge upwards in high pressure or warm air mass and other way in a low or cold