2-52. A rotor psychrometer differs from a 

 sling psychrometer in that the rotor 

 psychrometer 



1. consists of two separate thermometers 



2. is operated within the instrument 

 shelter 



3. contains a wick which must be 

 moistened with distilled water 

 before use 



4. is used to obtain information from 

 which relative humidity is determined 



2-53. The two thermometers of the ML-450A/UM 

 have a temperature range of 



1. -10° F to +100° F 



2. + 0° F to +110° F 



3. +10° F to +120° F 



4. +10° F to +110° F 



2-54. When all plastic parts of the ML-450A/UM 

 are cleaned, they should be washed with 

 a solution of 



1. ammonia and warm water 



2. mild soap and warm water 



3. cleaning solvent and warm water 



4. gasoline and solvent 



2-55. What type of batteries are used in the 

 ML-450A/UM? 



1. Size D, dry cell 



2. Size C, dry cell 



3. Size A, dry cell 



4. Size A, water activated 



2-56. How are the three batteries inserted in 

 the ML-450A/UM? 



1. Alternate with center contact first 



2. Center contact last 



3. Alternate with center contact last 



4. Center contact first 



2-57. Maintenance of the ML-450A/UM by Aerog- 

 rapher's Mates does NOT include which of 

 the following? 



1. Replacing the wick 



2. Lubricating the instrument 



3. Cleaning electrical contacts with 

 fine sandpaper 



4. Reuniting a separated column of 

 mercury in the dry-bulb thermometer 



2-58. Which of the following types of equip- 

 ment is NOT issued with the Semiautomatic 

 Meteorological Station AN/GMQ-14 ( )? 



1. Dewpoint recording equipment 



2. Dewpoint sensing equipment 



3. Pressure recording equipment 



4. Temperature sensing equipment 



2-59. A fuzzy line on the AN/GMQ-14 ( ) chart 

 may indicate the need for 



1. speeding up the chart movement 



2. cleaning the pen tube 



3. cleaning the pen tip 



4. replacing the pen 



2-60. The AN/SMQ-29( ) consists of how many 

 major components? 



1. One 



2. Two 



3. Three 



4 . Four 



2-61. Normal installation of the temperature 

 and dewpoint sensor is within how many 

 feet of the transmitter? 



1. 10 ft 



2. 15 ft 



3. 20 ft 



4. 25 ft 



2-62. In which of the following ways does the 

 recorder of the AN/GMQ-14 ( ) indicate 

 the quantity of rainfall? 



1. It indicates in separate steps each 

 inch of rain that falls 



2. It gives a continuous indication of 

 the amount of rain that falls 



3. It indicates in separate steps each 

 1/100 inch of rain that falls 



4. It indicates the interval of time 

 required for the measuring tube to 

 fill 



2-63. The bathythermograph (BT) is used to 

 obtain information on the 



1. temperature and pressure variances 

 in the lower levels of the ocean 



2. vertical temperature distribution 

 in the upper levels of the ocean 



3. surface temperature only 



4. pressure variances in the upper 

 levels of the ocean 



2-64. What are two of the greatest difficulties 



to overcome in preparing an accurate ocean- 

 ographic forecast? 



1. Too many reports and inaccuracies 



2. Too few reports and inaccuracies 



3. Time delay and inexperience 



4. Equipment error and time delay 



2-65. The airborne and shipboard bathythermo- 

 graphs will return temperature profiles 

 to what depths respectively? 



1. 600 ft and 1,200 ft 



2. 800 ft and 1,400 ft 



3. 1,000 ft and 1,500 ft 



4. 1,200 ft and 1,500 ft 



14 



