Pass mark 75% from twenty randomly chosen questions.
#1. At the passage of a warm front you would expect:
#2. The Internationl Standard Atmosphere (ISA) is a standard against which to compare the actual atmosphere at any point and time. Taking values at sea level, which of the following values is correct?
#3. The __________ is the boundary in the Earth’s atmosphere between the troposphere and the stratosphere.
#4. In the southern hemisphere, high pressure system winds circulate in which direction?
#5. The atmosphere:
#6. For smog to form:
#7. What is the wind that forms from the result of air warming on the side of a valley called?
#8. You are flying at a constant indicated altitude when you enter a region of higher air pressure. Without making any altimeter changes at all, what would happen to your actual altitude?
With an increase of ambient pressure, the altimeter would indicate that you are at a lower altitude.
The two hints here are that you are at constant INDICATED altitude (from your altimeter, of course) and that the subscale has not been adjusted to the new pressure. Therefore, as the altimeter starts to indicate a lower altitude, adjustments to the flight are made to return to the correct indicated altitude, when in fact you would be climbing,
In reality, this would hardly be noticeable with a realistic change of perhaps a maximum of 2hPa increase in pressure over your route, which would equate to a gain of 60 feet altitude.
#9. When referring to alto-cumulous cloud, what does the prefix “alto” mean?
#10. Mean sea level density in the International Standard Atmosphere (ISA) is:
#11. In the northern hemisphere, compared to the surface, the 2000 foot wind can be expected to:
#12. For saturated air, the lapse rate is _______________ ; this is called the Saturated Adiabatic Lapse Rate (SALR)
#13. The decode for hail in a METAR is:
#14. On a cold, clear night, ice crystals may form on a surface directly from water vapour. What is this process called?
#15. Lines joining places of equal atmospheric pressure are called:
#16. In the ISA, what is the atmospheric pressure at sea level?
#17. Select the true statement concerning isobar and windflow patterns around high and low pressure systems, as shown on synoptic charts:
#18. Fog that forms from the interaction of two airmasses is called:
#19. Following the passage of a typical cold front, an observer at the surface would expect to experience which of the following conditions: