1. The term "barometric pressure" refers to:
a. the pressure sensor value with applied corrections b. the actual pressure sensor value c. altimeter setting values only d. station pressure Answer
2. Match the following terms to their definition:
_____ Station Pressure a. the pressure value to which an aircraft altimeter scale is set so that it will indicate the altitude above mean sea level of an aircraft on the ground at the location for which the value was determined _____ Altimeter Setting b. a pressure value obtained by the theoretical reduction of barometric pressure to sea level _____ Sea-Level Pressure c. the atmospheric pressure at the designated station elevation Answer
3. Agency standard barometers are traceable to the standard:
a. at NOAA Headquarters b. of the U.S. Geological Survey c. of the National Institute of Standards and Technology d. of the United States Congress Answer
4. The station pressure is determined by adjusting the corrected barometric pressure to compensate for the difference in height between the barometer and:
a. the designated station elevation b. the designated field elevation c. the room floor d. the control tower elevation Answer
5. Sea-level pressure is an adjustment to the station pressure to compensate for:
a. density variations in the vertical column b. the effect of moisture on pressure c. temperature differences over the last 12-hours d. the difference in elevation between the station and sea-level Answer
6. The 12-hour mean temperature used in the sea-level pressure adjustment is calculated from:
a. the hourly temperatures for the last 12 hours b. the current ambient temperature and the ambient temperature 12 hours ago c. the high and low temperature for the day d. the high and low temperature during the last 12 hours Answer
7. The adjustment to the station pressure used to determine altimeter setting is based on the difference in height between the:
a. station elevation and sea-level b. field elevation and sea-level c. barometer height and the control tower cab d. station elevation and the field elevation
8. A pressure change remark is reported if the pressure is rising or falling at a rate of at least _____ inch per hour and the pressure change totals _____ inch or more at the time of observation.
Answer
9. Pressure tendency is reported on the _____ and _____ hourly report.
Answer
10. The character of a pressure change is based on the observed/recorded change in pressure over the past:
a. hour b. 3 hours c. 6 hours d. 24 hours Answer
11. The amount of pressure change is based on:
a. changes in sea-level pressure b. field elevation values c. the change in the absolute value of the station pressure or altimeter setting d. barograph values only Answer
12. Pressure values are rounded _____ to the next reportable value.
a. down b. up c. either up or down d. carefully Answer
13. Indicate the units used with each of the following pressure parameters:
_____ Altimeter Setting a. millibars _____ Sea-Level Pressure b. hectopascals _____ Station Pressure c. inches of mercury d. centimeters of mercury Answer
14. Altimeter setting is reported:
a. in all reports b. in the remarks section of all METAR reports (at designated stations) c. in METAR reports only d. in SPECI reports only Answer
15. Sea-level pressure is reported:
a. in all reports b. in the remarks section of all METAR reports (at designated stations) c. in METAR reports only d. in SPECI reports only Answer
1. b [11.1]
2. Station Pressure - c [11.3]
Altimeter Setting - a
Sea-Level Pressure - b
3. c [11.4.1]
4. a [11.4.3]
5. d [11.4.4]
6. b [11.4.4]
7. d [11.4.5]
8. 0.06 and 0.02 [11.4.6]
9. 3 and 6 [11.4.7]
10. b [11.4.7]
11. c [11.4.7]
12. a [11.5.1]
13. Altimeter Setting - c [Table 11-1]
Sea-Level Pressure - b
Station Pressure - c
14. a [11.5.3]
15. b [11.5.4]