In items 3-44 through 3-46, select from column 

 B the component of the RVR system that performs 

 each function listed in column A. 



In items 3-49 through 3-51, select from column 

 B the CV-3125/GMQ-10 control that is used to 

 perform each function listed in column A. 



A. Functions 



3- — Supplies light trans- 

 mittance signals in 

 the form of pulse 

 rates 



3-45. Receives the pulse 

 rates and corre- 

 lates them with 

 empirically 

 obtained visi- 

 bility data 

 encoded therein 



3-46. Displays visually 

 the visibility 

 values once every 

 minute 



3. Components 



1. AN/GMQ-10( ) 



2. ID-1939/GMQ- 

 10 



3. CV-3125/GMQ- 

 10 



4. AN/GMQ-13 



3-47. The RVR system will convert the pulse 



rates from transmissometer sets to their 

 corresponding visibility values. These 

 pulse rates are based on what length 

 baseline between the transmissometer 

 projector and receiver without adjustment 

 to the encoder disc? 



1. 300 ft 



2. 500 ft 



3. 700 ft 



4. 900 ft 



3-48. What digital visibility display is indi- 

 cated on the ID-1939/GMQ-10 if the visi- 

 bility is 5,280 feet? 



1. 1 



2. 52 



3. 528 



4. 5,280 



A. Functions 



3-49. To select the appli- 

 cable visibility 

 curves 



3-50. To identify the 



visibility curve in 

 use 



3-51. To place the equip- 

 ment in one of three 

 test conditions 



B. Controls 



1. NIGHT Indicator 

 and DAY Indi- 

 cator 



2. DAY-NIGHT 

 selector 



3. RUNWAY LIGHT 

 SETTING selector 



4. MODE selector 



Learning Objective: Identify the 

 different meteorological radar sets 

 and associated equipment, conduct 

 operational procedures, interpret 

 data received, and determine appli- 

 cable safety precautions. 



3-52. Which of the following types of equip- 

 ment permit the collection of information 

 for weather purposes in overcast 

 conditions? 



1. Range markers 



2. Antennas 



3. Radars 



4. Cathode ray tubes 



3-53. The radar electromagnetic pulse travels 

 at the speed of 



1 . sound 



2. light 



3. 250 mph 



4. 100 mph 



3-54. What does the PPI scope display? 



1. Altitude 



2. Range only 



3. Bearing only 



4. Range and bearing 



3-55. The radar operator must know the minimum 



and maximum ranges that weather echoes can 

 be picked up by the gear and the 



1. accuracy of the range and bearing 

 display 



2. frequency with which the pulse is 

 transmitted 



3. energy level of the radar 



4. loss of radar energy 



19 



