Atmosphere Questions PDF

## QUESTIONS ON ATMOSPHERE 1. Lowest layer of atmosphere is - Troposphere - Tropopause - Stratosphere 2. Height of Tropopause at equator is - 8-10 km - 16-18 km - 14 km 3. Height of Tropopause at Poles is - 12 km - 13 km - 08 km 4. Higher the surface temperatur...

## QUESTIONS ON ATMOSPHERE 1. Lowest layer of atmosphere is - Troposphere - Tropopause - Stratosphere 2. Height of Tropopause at equator is - 8-10 km - 16-18 km - 14 km 3. Height of Tropopause at Poles is - 12 km - 13 km - 08 km 4. Higher the surface temperature, would be the tropopause - Higher - Lower - Same 5. Height of tropopause. - Is constant - Varies with altitude - Varies with Latitude 6. Above 8 km the lower temperatures are over............ - Equator - Mid Latitudes - Poles 7. Atmosphere is heated by - Solar Radiation - Heat from earth surface - From above 8. The temperature at 80 km is... - 173 K - 100 K - -137°C 9. CO2 and H2O are also called - Green House Gases - Rare Earth Gases 10. Troposphere is generally - Stable - Unstable - Neutral 11. Stratosphere is ......... - Unstable - Neutral - Stable 12. Tropopause is discontinuous at about............ - 30°lat - 40°lat - 80°lat 13. Most of atmospheric mass is contained in ............ - Troposphere - Stratosphere - Heterosphere 14. Stratosphere extends from Tropopause to............ - 50 km - 60 km - 40 km 15. The middle atmosphere layer with temperature inversion and stability............ - Troposphere - Tropopause - Stratosphere 16. Mother of Pearl clouds occur in.. - Mesosphere - Thermosphere - Stratosphere 17. The temperature in ISA at 17 km is - -56.5°C - -65.5° C - -35.5°C 18. By weight, approximate ratio of O2 to N2 in the atmosphere is. - 1:3 - 1:4 - 1:5 19. By volume, the approximate ratio of O2 to N2 in the atmosphere is. - 1:3 - 1:4 - 1:5 20. By volume, the proportion of CO2 in the atmosphere is - 3% - 0.3% - 0.03% 21. In ISA, the mean sea level temperature is - 15° C - 10° C - 25°C 22. Maximum concentration of ozone is at a height of....... - 10-15 km - 20-25 km - 30-35 km 23. Additional oxygen is needed while flying above...... - 5000 ft - 7000 A - 10000 ft 24. CO2 and H2O keep the atmosphere - Warm - Cold - Have no effect 25. Noctilucent clouds occur in - Thermosphere - Mesosphere - Stratosphere 26. Temperature at 2 km is 05°C, what is ISA deviation. Hint: (Actual - ISA) - -05°C - -02°C - 03°C 27. Pressure at MSL is 1002.25 hPa. Find the ISA deviation Hint: (Actual-ISA) - -11 hla - -4.5°C - 10 hPa 28. In actual atmosphere temp. at 19 km is -60°C. Find the ISA deviation? - -05.5° C - -03.5°C - 12 hPa 29. Nacreous clouds occur in - Thermosphere - Mesosphere - Upper Stratosphere 30. The atmosphere up to 80 km has a nearly similar composition and is called the Homosphere. Its uniform composition is due to - Pressure - Gravitation of earth - Mixing due to turbulence 31. Half of the atmospheric air mass is contained ........below - 20,000 ft - 15,000 ft - 10,000 ft 32. In jet standard atmosphere the Lapse Rate is - 2°C/1000 ft - 2°C/km - 5°C/km 33. The rate of fall of temperatures with height, called - Isothermal rate - Inversion Rate - Lapse Rate 34. In actual atmosphere the lapse rate could - Assume any value - fall up to 8 km. - rise up to 50 km 35. Tropical Tropopause extends from the equator to Lat. 35°-40°. Over India it is at - 20-21 km - 14-15 km - 16-16.5 km 36. Lapse rate in the troposphere is produced by........... and in the stratosphere by........ - Evaporation; condensation - Terrestrial radiation; solar radiation - rising air, solar radiation - solar radiation; convection 37. Most of the water vapour in the atmosphere is confined up to - stratosphere - Mid troposphere - lower troposphere - 30,000 ft 38. Negative lapse rate of temperature is - Isothermal rate - temperature rise with lowering height - Temperature rise with height - temperature fall with height 39. In ICAO ISA the atmosphere is assumed to be isothermal - in stratosphere - 11 to 16 km - 11 to 20 km - 11 to 32 km 40. One of the characteristics of our atmosphere is - Poor conductor of heat and electricity - Equator is warmer than poles above 10 km - Lapse rate in the stratosphere e is positive - Density is constant above 8 km 41. Heat transfer in the atmosphere is maximum due to - convection - radiation - sensible heat - latent heat 42. The knowledge of the height of tropopause is important for a pilot because - clouds rarely reach up to this height due to jetstream - weather is mainly confined up to this level - stratosphere starts at this height where all solar radiation are absorbed 43. In ISA atmosphere the tropopause occurs at a height of - 8-10 km - 11 km - 16-18 km 44. Most of the transfer of heat in the atmosphere is due to - Conduction and freezing - convection and evaporation - Condensation, sublimation and freezing - sublimation and radiation 45. There is reversal of temperature in the atmosphere at 8 km because - Lapse rate at poles is always higher than at equator - Lapse rate at equator is always higher than at poles - Lapse rate at equator is the same as at poles even above the poles - Lapse rate reverses at poles and becomes negative ## ANSWERS - Q1: a - Q2: b - Q3: c - Q4: b - Q5: c - Q6: c - Q7: a - Q8: c - Q9: a - Q10: b - Q11: c - Q12: b - Q13: a - Q14: b - Q15: c - Q16: b - Q17: a - Q18: b - Q19: c - Q20: c - Q21: a - Q22: b - Q23: c - Q24: a - Q25: b - Q26: a - Q27: c - Q28: c - Q29: b - Q30: c - Q31: b - Q32: c - Q33: c - Q34: a - Q35: d - Q36: c - Q37: c - Q38: b - Q39: d - Q40: b - Q41: b - Q42: c - Q43: c - Q44: b - Q45: d