2–19. How often will antenna and pedestal  restoration  be  performed on  the  AN/SPS–40B/C/D/E  radar? 1. About every 3 years 2. About every 5 years 3. Every 7 years 4. Every 10–15 years 2–20. The  AN/GPN–27  radar  antenna  group provides  constant  radiation altitude  coverage  of  how  many degrees above the peak of the beam? 1. 15 degrees 2. 30 degrees 3. 45 degrees 4. 60 degrees 2–21. In the AN/GPN–27, which of the following  video  signals  are provided to the processor unit by the  receiver? 1. Normal  video 2. Log  video 3. Moving  target  indicator  video 4. fill of the above 2–22. Which  of  the  intercommunication system  stations   are located in the transmitter  building  group  of  the AN/GPN–27  radar? 1. One master station only 2. One slave station only 3. One master station and one slave  station 4. Two master stations and one slave station 2–23. Where  is  the  16–inch  maintenance ppi  for  the  AN/GPN–27  located? 1. Display site 2. Transmitter  building 3. Antenna site 4. Air  traffic  control  room 2–24. The operator of which type of radar is able to control the antenna  when  searching  in  a  target sector? 1. Surface  search 2. 2D air search 3. 3D air search 4. Ground–controlled   approach 2–25. Which  of  the  following  statements describes  the  radiated  frequency of a 3D air search radar during electronic  scanning? 1. It changes in discrete steps at each elevation angle 2. It remains constant at each elevation  angle 3. It changes beam width 4. It changes randomly 2–26. Which of the following radars is a Precision  Approach  Landing  System (PALS)? 1. AN/SPN–42A 2. AN/SPN–46(V) 3. AN/GPN-27 4. AN/FPN–63 2—27. Which of the following systems iss installed at naval air stations for PALS training of flight crews, operators, and  maintenance personnel 1. AN/SPN–42T1/3/4 2. AN/SPN–46(V)1 3. AN/SPN–46(V)2 4. AN/FPN-63 2–28. How many aircraft can the AN/SPN–46(V)  control  simul– taneously  and  automatically  during the final approach and landing phase of carrier recovery operations? 1. 5 2. 2 3. 3 4. 4 8