NAVEDTRA 14270 MOD-2

1-1 Upper-air observations measure what two levels of the atmosphere?
1. The troposphere and stratosphere
2. The troposhere and the mesosphere
3. The stratoshere and mesosphere
4. The mesosphere and thermosphere

1-2 What type of upper-air observation evaluates pressure, temperature, humidity, and wind direction and speed?
1. Radiosonde
2. Pawinsonde
3. Pibal
4. Rocketsonde

1-3 What type of upper-air observation is used to measure lower-level winds only?
1. Radiosonde
2. Rawinsonde
3. Rabal
4. Pibal

1-4 Which of the following publications contains detailed information on conducting Rawinsonde and Pibal Observations?
1. WMO Publication 306
2. NAVMETOCCOMINST 3140.1
3. FMH-1
4. FMH-3

1-5 What balloons are best suited for Rawinsonde observations during strong winds?
1. 100 gram
2. 300 gram
3. 600 gram
4. 1,200 gram

1-6 What is the ideal ascension rate, in feet per min, for a meteorological balloon?
1. 395 to 1,640 fpm
2. 600 to 1,000 fpm
3. 900 to 1,000 fpm
4. 950 to 1,550 fpm

1-7 Of the following gases, which one is recommended for inflating meterological balloons?
1. Helium
2. Natural gas
3. Hydrogen
4. Oxygen

1-8 How much heluim is required to achieve a 700-gram free-lift weight for a 100-gram balloon?
1. 25 cubic feet
2. 40 cubic feet
3. 50 cubic feet
4. 65 cubic feet

1-9 Free lift must be increased during periods of precip or icing?
1. True
2. False

1-10 Which of the following signals from the MRS unit indicates high quality reception from the radiosonde transmitter?
1. A steady tone
2. a steady green light
3. at least one asterisk displayed in the LCD window
4. At least 5 asterisks displayed in the LCD window

1-11 Which of the following personnel grants permission for a radiosonde launch aboard ship?
1. Aft Lookout
2. Master-At- Arms
3. Officer of the Deck
4. Executive Officer

1-12 When you use the MRS, abbreviations on the significant levels printout indicate the reason why the level was selected. Of the following abbreviations, which one indicates a max wind level?
1. T
2. U
3. TR
4. MV

1-13 The "TEMP" function of the MRS produces what type of printout?
1. Coded message printout
2. Raw data printout
3. Pibal message printou
4. Significant levels printout

1-14 When are black pilot balloons used for a Pibal observation?
1. Clear sky
2. Low-overcast sky
3. Hazy sky
4. High-overcast sky

If only one upper-air observation is conducted per day, for what synoptic hour is the oberservation conducted?
1. 0000z only
2. 1200z only
3. 0000z or 1200z, whichever one is closer to local sunrise
4. 0600z or 1800z, whichever one is closer to local sunrise

What parts of the TEMP code contain data for the standard atmospheric pressure surfaces?
1. Parts A and B
2. Parts A and C
3. Parts B and C
4. Parts C and D

What are the two types of upper-air observations still conducted by Navy and Marine Corps personnel?

What is the purpose of the GPS antenna?

At sea, when is a parachute required to be attached to the radiosonde?

What causes an upper-air sounding to be automatically terminated by the MRS system?

Which publication contains detailed info on conducting Pibal observations?