2-31. Ink tanks and pens of the RD-108( )UMQ-5 

 recorder may be installed and removed for 

 servicing when the chart drive is 



1. removed only 



2. tilted forward only 



3. in its operating position only 



4. removed, tilted forward, or in its 

 operating position 



2-32. When the ink tanks of the RD-108 are 



cleaned and all the dried ink does NOT 



come off, they should be soaked in a 



solution of 2-36. 



1. alcohol 



2. turpentine 



3. gasoline 



4. soap and water 



2-33. Which of the following AN/UMQ-5( ) main- 

 tenance procedures may be performed by 

 an AG3? 



1. Replacing the transmitter impeller 



2. Rebalancing the recorder pen element 



3. Lubricating the transmitter components 2-37. 



4. Replacing the servo follower in the 

 recorder 



Learning Objective: Recognize the 

 ways of determining true winds at 

 sea utilizing the True Computer 

 CP-264/UM and the true wind observ- 

 ing methods. 



2-34. Which of the following is NOT a method 



of checking winds computed on the 2-38. 



CP-264/UM True Wind Computer for 



accuracy? 



1. The true direction of the wind is 

 always on the same side of the ship 



as the apparent direction, but farther 

 from the bow (bow or starboard) than 

 the apparent direction 



2. The true speed of the wind is greater 2-39. 

 than the apparent speed whenever the 

 apparent direction is aft of the beam 



3. The true speed of the wind is less 

 than the apparent speed whenever the 

 true direction is forward of the beam 



4. The true direction of the wind is 

 always on the opposite side of the 

 ship from the apparent direction, but 

 farther from the bow (port or star- 

 board) than the apparent direction 2-40. 



2-35. Refer to Table 3-3 in your textbook. 



Small waves, becoming longer with fairly 

 frequent white foam crests, provide an 

 estimated wind of 



1. 6 kn 



2. 10 kn 



3. 14 kn 



4. 20 kn 



Learning Objective: Recognize the 

 characteristics, nomenclature, main- 

 tenance requirements, and procedures 

 for using temperature, humidity, and 

 precipitation measuring instruments; 

 and procedures for computing and 

 recording temperature, humidity, and 

 precipitation observations. 



The temperature, which is defined as the 

 measure of its molecular activity, is 

 measured on an arbitrary scale from that 

 point at which its molecules stop moving. 

 This point is known as 



1. absolute zero 



2. its boiling point 



3. its freezing point 



4. zero on whatever thermometer is 

 being used 



When a sling psychrometer is used, the 

 operator must whirl it several times, 

 read both thermometers to the nearest 

 tenth of a degree, and repeat the whirling 

 until the wet-bulb temperature fails to 

 show further decline. The difference 

 between the dry-bulb and wet-bulb tem- 

 peratures is known as the 



1. absolute humidity 



2. wet-bulb depression 



3. relative humidity 



4. dewpoint 



If a sample of air is saturated at a 

 temperature of 52° F, what will be the 

 reading of the sample's dewpoint? 



1. Exactly 52° F 



2. Between 45° and 52° F 



3. Between 52° and 59° F 



4. 60° F or above 



Which equipment, if available, is used 



by the Navy in preference to all other 



equipments to make the psychrometric 



observations to be entered in columns 



7, 



1. 



2. 



3. 



4. 



3, 18, 19, and 20 of an MF1-10 form? 

 The rotor psychrometer 

 The remote recording hygrothermometer 

 The psychrometric computer 

 The sling psychrometer 



When a remote recording hygrothermometer 

 is used, Fahrenheit temperature values are 

 read on the 



1. left-hand edge of the trace to the 

 nearest degree 



2. left-hand edge of the trace to the 

 nearest tenth of a degree 



3. right-hand edge of the trace to the 

 nearest degree 



4. right-hand edge of the trace to the 

 nearest tenth of a degree 



12 



