DGCA Question Bank
4,298 questions with answers and explanations · growing weekly
The lowest layer of the atmosphere is the:
The height of the tropopause at the Equator is approximately:
The height of the tropopause at the Poles is approximately:
The higher the surface temperature, the ____ the tropopause:
The height of the tropopause:
Above 8 km, the lower temperatures are found over the:
The atmosphere is heated mainly by:
The stratosphere is:
The tropopause is discontinuous (has breaks) at about:
Most of the atmospheric mass is contained in the:
The stratosphere extends from the tropopause up to about:
The atmospheric layer characterised by a temperature inversion and great stability is the:
Mother-of-pearl (nacreous) clouds occur in the:
In the ISA, the temperature at 17 km is:
By weight, the approximate ratio of O₂ to N₂ in the atmosphere is:
By volume, the approximate ratio of O₂ to N₂ in the atmosphere is:
By volume, the proportion of CO₂ in the atmosphere is about:
In the ISA, the mean sea level temperature is:
The maximum concentration of ozone is at a height of about:
Supplemental oxygen is required when flying above about:
CO₂ and water vapour keep the atmosphere:
Noctilucent clouds occur in the:
If the temperature at 2 km is +5°C, the ISA deviation (Actual − ISA) is:
If the MSL pressure is 1002.25 hPa, the deviation from the ISA MSL pressure is:
If the temperature at 19 km is −60°C, the ISA deviation is: