Page:Electronics Technician - Volume 7 - Antennas and Wave Propagation - NAVEDTRA 14092.pdf/113

 2-35. The adjustable stub on the AS-390/SRC uhf antenna is used to adjust what antenna characteristic?
 * 1) The counterpoise angle
 * 2) The input impedance
 * 3) The radiation angle
 * 4) The feed point

2-36. The OE-82B/WSC-I(V) antenna group uses what type of polarization?
 * 1) Vertical
 * 2) Horizontal
 * 3) Right-hand circular
 * 4) Left-hand circular

2-37. The AN/WSC-S (V) shore station antenna consists of what number of OE-82A/WSC-1 (V) assemblies?
 * 1
 * 2
 * 3
 * 4

2-38. What does the acronym LPI stand for?
 * 1) Low power interference
 * 2) Low probability of intercept
 * 3) Low phase intercept
 * 4) Last pass intercept

2-39. The reflectors for the AN/WSC-6 (V) are mounted on three-axis pedestals and provide auto tracking using what scanning technique?
 * 1) Conical
 * 2) Peripheral
 * 3) Vertical
 * 4) Horizontal

2-40. Antenna tuning is accomplished using what piece or pieces of equipment?
 * 1) Couplers
 * 2) Tuners
 * 3) Multicouplers
 * 4) All the above

2-41. Antenna multicouplers are used to match more than one transmitter or receiver to what number of antennas?
 * 1
 * 2
 * 3
 * 4

2-42. The AN/URA-38 antenna coupler is an automatic tuning system primarily used with which radio transmitter?
 * 1) AN/WSC-3
 * 2) AN/URT-23
 * 3) AN/URC-8O
 * 4) AN/FRT-84

2-43. The AN/SRA-57 coupler group operates in which of the following frequency ranges?
 * 1) 2-6 Mhz
 * 2) 4-12 Mhz
 * 3) 10-30 Mhz
 * 4) 40-60 Mhz

2-44. How many channels are provided with the AN/SRA-12 multicoupler?
 * 4
 * 5
 * 6
 * 7

2-45. What type of radar would use a truncated paraboloid reflector that has been rotated 90 degrees?
 * 1) A surface search
 * 2) An air search
 * 3) A navigation
 * 4) A height-finder

2-46. Of the following methods, which is NOT used to feed a cylindrical paraboloid reflector? 9
 * 1) A linear array of dipoles
 * 2) A slit in the side of a waveguide
 * 3) A thin waveguide radiator
 * 4) A quarter-wave stub