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|  CHAPTER ONE
AVIATION WEATHER
12. In the lower 5000 feet of the atmosphere, a decrease of one inch of mercury in atmospheric
pressure would cause a change in an altimeter reading of approximately ________ feet (assuming
constant elevation and altimeter setting).
a.
minus 100
b.
plus 100
c.
minus 1000
d.
plus 1000
13.
Which one of the following correctly describes the meteorological feature of a trough?
a.
An elongated area of relatively low pressure.
b.
An elongated area of relatively high pressure that extends from the center of a high
pressure area.
c.
An area where the pressure in the center is higher than the surrounding areas.
d.
A long shallow often V-shaped receptacle for the drinking water or feed of domestic
animals.
14. Which one of the following items would have a value closest to that used as a Kollsman
window setting for an altimeter in the U.S. (assuming an airfield above sea level)?
a.
Station pressure
b.
Station temperature
c.
AGL pressure
d.
Sea level pressure
15.
The height of an aircraft above the ground is known as_______________.
a.
MSL/True altitude
b.
AGL/absolute altitude
c.
indicated altitude (IA)
d.
pressure altitude (PA)
16. Which one of the following types of altitudes would be assigned in the U.S. above
18,000 feet MSL?
a.
MSL/True altitude
b.
AGL/absolute altitude
c.
Indicated altitude (IA)
d.
Pressure altitude (PA)
17.
Density altitude is_____________.
a.
the same as an MSL/True altitude
b.
pressure altitude corrected for nonstandard field elevations
c.
an indicator of aircraft performance
d.
the height above the standard datum plane
1-16
General Structure of the Atmosphere, and Atmospheric Temperature and Pressure
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