4-40. What is the normal operating temperature 4-47. 

 of the Ozalid machine? 



1. 100° to 180° F 



2. 150° to 200° F 



3. 180° to 210° F 



4. 200° to 230° F 



4-41. How often should the ammonia supply in the 

 Ozalid machine be replenished? 



1. Daily 



2. Weekly 4-48. 



3. Bimonthly 



4. Monthly 



4-42. When should the bearing and drive assembly 

 of the Ozalid machine be lubricated? 



1. Daily, before each use 



2. Weekly 



3. Monthly 4-49. 



4. Semiannually 



4-43. Which part of the code-a-phone acts as 

 the microphone? 



1. Ear piece 



2. Mouth piece 



3. Pitch amplifier 



4. Volume control amplifier 



4-44. How often should the platen on the type- 

 writer be cleaned? 



1. Daily 



2. Biweekly 



3. Weekly 



4. Bimonthly 



What is the purpose of the signal genera- 

 tor? 



1. To calibrate the radiosonde recorder 



2. To calibrate the radiosonde trans- 

 mitter prior to release 



3. To ensure proper operation of the 

 radiosonde 



4. To ensure a stable atmosphere for the 

 radiosonde transmitter 



What piece of equipment is used to provide 

 a stable atmosphere for the 403 MHz radio- 

 sonde transmitter? 



1. AN/GMM-1 



2. AN/UMM-1 



3. AN/GMM-3 



4. ML-428/UM 



Which of the following performs as a 

 frequency meter and power output meter 

 for the AN/AMT-4? 



1. Battery test set 



2. AN/UMM-1 



3. AN/GMD-1 



4. Test Set TS-538/U 



Learning Objective: Identify the 

 various balloons as to their nomen- 

 clature, uses, and associated com- 

 ponents and the instrumentation 

 used in making upper air soundings. 



Learning Objective: Identify the 

 operating principles, components, 

 and equipment associated with the 

 radiosonde transmitter. 



4-45. What instrument is used to obtain a verti- 

 cal profile of the atmosphere? 



1. A transducer 



2. A radiosonde transmitter 



3. A transceiver 



4. A humidity chamber 



4-46. Which of the following is NOT transmitted 

 by the radiosonde transmitter? 



1. Dew-point 



2. Pressure 



3. Temperature 



4. Relative humidity 



4-50. What two standard size balloons are used 

 for PIBALs? 



1. 30 and 100 gram 



2. 50 and 100 gram 



3. 100 and 300 gram 



4. 300 and 600 gram 



4-51. What is the reason for having different 

 sizes and colors for PIBAL balloons? 



1. Ease in accountability 



2. Various weather conditions 



3. Various types of stations 



4. Ease in identifying size by color 



4-52. What size balloon, if any, is standard for 

 radiosonde observations? 



1. No standard size 



2. 300 gram 



3. 600 gram 



4. 1,200 gram 



4-53. What is the primary factor to consider in 

 determining if a neoprene balloon is to 

 be conditioned? 



1. Desired height to be obtained 



2. Storage conditions 



3. Desired ascension rate 



4. Local weather conditions 



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