Training Guide in Surface Weather Observations - Multiple Choices
Training Guide in Surface Weather Observations - Multiple Choices
Training Guide in Surface Weather Observations - Multiple Choices
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7. Sea-level pressure is an adjustment to the station pressure to compensate for:<br />
a. density variations <strong>in</strong> the vertical column<br />
b. the effect of moisture on pressure<br />
c. temperature differences over the last 12-hours<br />
d. the difference <strong>in</strong> elevation between the station and sea-level<br />
8. The 12-hour mean temperature used <strong>in</strong> the sea-level pressure adjustment is calculated from:<br />
a. the hourly temperatures for the last 12 hours<br />
b. the current ambient temperature and the ambient temperature 12 hours ago<br />
c. the high and low temperature for the day<br />
d. the high and low temperature dur<strong>in</strong>g the last 12 hours<br />
9. A pressure change remark (PRESRR or PRESFR) is reported if the pressure is ris<strong>in</strong>g or fall<strong>in</strong>g at<br />
a rate of at least <strong>in</strong>ch per hour and the pressure change totals <strong>in</strong>ch or more at the<br />
time of observation.<br />
10. The character of a pressure change is based on the observed/recorded change <strong>in</strong> pressure over the<br />
past:<br />
a. hour<br />
b. 3 hours<br />
c. 6 hours<br />
d. 24 hours<br />
11. Indicate the units used with each of the follow<strong>in</strong>g pressure parameters:<br />
Altimeter Sett<strong>in</strong>g a. millibars<br />
Sea-Level Pressure b. hectopascals<br />
Station Pressure c. <strong>in</strong>ches of mercury<br />
d. centimeters of mercury<br />
12. The barograph correction should be entered <strong>in</strong> column 38 to the nearest:<br />
a. .001<br />
b. .01<br />
c. .005<br />
d. .05<br />
13. Station pressure shall be determ<strong>in</strong>ed by adjust<strong>in</strong>g the corrected barometric pressure to compensate<br />
for the difference between the height of the barometer and the:<br />
a. designated station elevation<br />
b. sea-level pressure<br />
c. altimeter sett<strong>in</strong>g<br />
d. none of the above<br />
7-6